Mega Battle Challenge

Mega Battle Challenge was an event in Pokémon GO part of Mega September event series.

Features
CP of Mega Beedrill was significantly higher during the event. Regardless of CP level of its standard form, after Mega-Evolving Beedrill, it would have CP equal to Pokémon Level 44.

Featured Pokémon
Mega Houndoom was unlocked on September after Trainer completed 275 million battles.

PS Houndoom

These Shiny Pokémon were released at the start of the event: PS Ledyba PS Ledian

These Bug-type Pokémon had increased spawn rates in the wild and from Incense or Lure Modules:

Field Research event tasks
These Field Research tasks were available during the event:

Timed Research
Mega Battle Challenge Timed Research was available during the event:

Shop special offer
These one-time purchase offers were available from the shop during the event:

Trivia

 * The official blog claimed that different Shadow Pokémon would be used by Team GO Rocket, but no new lineups were discovered.
 * According the community research group, the proportions of Dark-, Grass- and Psychic-type Grunts had increased.
 * In the first few hours of event, catching any type of Pokémon counted towards the Ledyba task, rather than catching Bug-type only.