List of Raid Bosses changes/2020

This page is the list of changes of Raid Bosses occurred in 2020.

In this year, Incarnate Forme of Tornadus, Thundurus and Landorus, Reshiram, Zekrom and Kyurem were introduced. Genesect was also made into Raid Battles after first introduced in Special Research.

On August, Tier 2 and 4 were merged with Tier 1 and Tier 3 respectively. Mega Raids were introduced afterward.

January 2nd
Raid Bosses returned to previous layout of Virizion after Holiday. Party hat Raticate and Wobbuffet joined tier 2 at 1 p.m. PST in Hatchathon 2020.

January 7th
Heatran returned with shiny variant available. Mainly the types of tier 1 to 4 Raid Bosses are strong against Heatran.

January 10th
Timburr joined tier 1.

January 16th
Party hat Pokémon left.

January 24th
The Lunar New Year 2020 featured red-color Raid Bosses. In addition, Latias and Latios returned in Special Raid Weekend until January 27th.

January 28th
The Eon Duo left.

February 3rd
Raid Bosses returned to previous layout of Heatran after Lunar New Year.

February 4th
Tornadus became available. Mainly the types of tier 1 to 4 Raid Bosses are strong against Tornadus.

February 7th
The Sinnoh Celebration featured Sinnoh and pre-evolution of Sinnoh Pokémon. Misdreavus and Staraptor were previously a tier 1 and 4 Raid Boss respectively.

February 11th
Raid Bosses returned to previous layout of Tornadus after Sinnoh Celebration.

February 14th
The Valentine's Day 2020 featured pink-colored Raid Bosses. Chansey and Miltank were previously tier 3 Raid Bosses. Shiny Lickitung was released on Special Raid Challenge.

February 18th
Raid Bosses returned to previous layout of Tornadus after Valentine's Day.

February 25th
The Pokémon Day 2020 featured Armored Mewtwo, party hat and Clone Kanto Starters. Mainly the types of tier 1 to 4 Raid Bosses are strong against Mewtwo. Pinsir was previously a tier 3 Raid Boss.

March 2nd
Thundurus became available. Mainly the types of tier 1 to 4 Raid Bosses are strong against Thundurus. Abomasnow was previously a tier 4 Raid Boss.

March 6th
The Team GO Rocket Global Take-over featured Poison- and Dark-type Raid Bosses. Umbreon was previously a tier 4 Raid Boss. Darkrai returned with shiny variant available.

March 10th
The GO Battle League Preparation featured strong Pokémon for GO Battle League. Umbreon was previously a tier 3 Raid Boss.

March 13th
Giratina Altered Forme was featured in this Special Raid Weekend.

March 17th
Raid Bosses returned to previous layout of Thundurus after Team GO Rocket Global Take-over and GO Battle League Season 1 Launch Celebration. Cobalion joined tier 5 at 1 p.m. PDT. Regigigas EX Raid Battle was over.

March 20th
A Drive to Investigate featured Bug- and Steel-type Raid Bosses. Pinsir was previously a tier 2 Raid Boss.

March 24th
Raid Bosses returned to previous layout of Thundurus after A Drive to Investigate.

March 27th
The Psychic Spectacular 2020 featured Psychic-type Raid Bosses.

March 31st
Raid Bosses returned to previous layout of Thundurus after Psychic Spectacular. Landorus became available at 1 p.m. PDT. Mainly the types of tier 1 to 4 Raid Bosses are strong against Landorus. Mantine was previously a tier 3 Raid Boss.

April 1st
The Tricky Pokémon featured Raid Bosses known to be pranksters and masters of disguise. Wobbuffet was previously a tier 2 Raid Boss.

April 8th
Raid Bosses returned to previous layout of Landorus after Tricky Pokémon.

April 21st
The Buddy Up featured different Raid Bosses.

April 28th
Raid Bosses returned to previous layout of Landorus after Buddy Up. Darkrai returned to Raid Battles at 1 p.m. PDT. Mainly the types of tier 1 to 4 Raid Bosses are strong against Darkrai. Combee and Machamp were previously a tier 2 and 3 Raid Boss respectively.

May 1st
The Throwback Challenge 2020: Kanto featured Kanto Raid Bosses. Tangela was previously a tier 2 Raid Boss.

May 5th
Giratina Altered Forme returned.

May 8th
The Throwback Challenge 2020: Johto featured Johto Raid Bosses. Granbull and Umbreon were previously a tier 3 and 4 Raid Boss respectively.

May 12th
Virizion returned with shiny variant available.

May 15th
The Throwback Challenge 2020: Hoenn featured Hoenn Raid Bosses. Feebas and Medicham were previously a tier 1 and 3 Raid Boss respectively.

May 19th
Terrakion returned with shiny variant available.

May 22nd
The Throwback Challenge 2020: Sinnoh featured Sinnoh Raid Bosses. Cranidos, Combee and Croagunk were previously tier 1 and Bronzong and Abomasnow were previously tier 3 Raid Bosses.

May 27th
Reshiram became available.

May 29th
The raid pool was changed after Throwback Challenge 2020: Sinnoh. Mainly the types of tier 1 to 4 Raid Bosses are strong against Reshiram. This set was accidentally made live on the debut day of Reshiram, but it was changed back to the Sinnoh set after a while.

June 3rd
The Throwback Challenge Champion 2020 featured Unova Raid Bosses.

June 9th
Raid Bosses returned to previous layout of Reshiram after Throwback Challenge 2020.

June 12th
Latias and Latios returned in Special Raid Weekend.

June 16th
The Eon Duo left. Zekrom became available at 1 p.m. PDT. Mainly the types of tier 1 to 4 Raid Bosses are strong against Zekrom.

June 19th
The Summer Solstice event featured different Raid Bosses.

June 25th
Raid Bosses returned to previous layout of Zekrom after Summer Solstice.

June 26th
The Bug Out 2020 event featured Bug-type Raid Bosses. Skorupi was previously tier 1, Anorith and Masquerain were previously tier 2 and Pinsir was previously tier 3 Raid Boss.

July 2nd
Raid Bosses returned to previous layout of Zekrom after Bug Out.

July 3rd
Ho-Oh returned in Special Raid Weekend. Mainly the types of tier 1 to 4 Raid Bosses are strong against Ho-Oh.

July 7th
Ho-Oh left. The 4th Anniversary featured Flying-type Raid Bosses. Drifloon and Pidgeot were previously a tier 1 and 3 Raid Boss respectively. Kyurem became available at 1 p.m. PDT.

July 9th
The raid pool was changed after the 4th Anniversary. Mainly the types of tier 1 to 4 Raid Bosses are strong against Kyurem. Machamp was previously a tier 4 Raid Boss.

July 10th
The Team GO Rocket Event featured Poison- and Dark-type Raid Bosses. Skorupi, Croagunk, Tentacruel, Weezing and Lickitung were previously tier 2 Raid Bosses.

July 16th
Raid Bosses returned to previous layout of Kyurem after Team GO Rocket Event.

July 17th
The Summer Event featured summer-themed Raid Bosses. Hippopotas was previously a tier 1 Raid Boss.

July 23rd
Raid Bosses returned to previous layout of Kyurem after Summer Event.

July 25th
The Pokémon GO Fest 2020 featured different Raid Bosses, focusing on Legendary Pokémon. Chansey was previously a tier 4 Raid Boss.

July 26th
The Day 2 of Pokémon GO Fest 2020 changed the Legendary Pokémon.

July 27th
Raid Bosses returned to previous layout of Kyurem after Pokémon GO Fest.

July 31st
The Dragon Week featured Dragon-type Raid Bosses. Vibrava was previously a tier 2 Raid Boss.

August 7th
The Enigma Week featured Psychic-type Raid Bosses.

August 14th
The Unova Week featured Unova Raid Bosses. Roggenrola, Liepard and Ferroseed were previously a tier 1, 2 and 3 Raid Boss respectively.

August 21st
Heatran returned. Mainly the types of tier 1 to 4 Raid Bosses are strong against Heatran.

August 26th
Tier 2 and 4 were merged with Tier 1 and Tier 3 respectively, removing and changing tiers of a few Raid Bosses.

August 27th
The launch of Mega Evolution introduced Mega Raids.

September 10th
Cresselia returned. Mainly the types of tier 1 and 3 Raid Bosses are strong against Cresselia.

September 18th
Articuno returned. Mainly the types of tier 1 and 3 Raid Bosses are strong against Articuno. Mega Pidgeot was added.

September 22nd
The Mega Buddy Challenge featured large-sized Raid Bosses.

September 25th
Zapdos returned. Mainly the types of tier 1 and 3 Raid Bosses are strong against Zapdos. The Raid Bosses remained the same after the Mega Buddy Challenge.

September 29th
Mega Houndoom was added. Mainly the types of tier 1 and 3 Raid Bosses are strong against Mega Houndoom.

October 2nd
The Fashion Week featured fashion-themed Raid Bosses. Moltres returned to Raid Battles at 1 p.m. PDT.

October 9th
Raid Bosses became strong against Moltres after Fashion Week.

At 8 a.m. PDT, the Autumn Event featured autumn-themed Raid Bosses. Giratina Origin Forme returned with shiny variant available at 1 p.m. PDT.

October 12th
The Seasons Change: Part 2 featured Poison- and Dark-type Raid Bosses.