Pokémon Unite has just launched its Halloween Festival, which runs from October 20 to November 7. The Halloween event is the first major MOBA seasonal patch and features a new game mode, new Pokémon, new clothes, new holowears, and other goodies. While the holowear and most of the new clothes, including the excellent pumpkin mask, are available in the Aeos Emporium, the rest of the rewards must be unlocked with pumpkins.
While the daily event bonuses are still running, the pumpkin-related events have now occupied the first three slots of the Events menu. Some pumpkins can be earned simply by logging in each day, but most are unlocked by playing Halloween in the Wed stadium, which is the new setting for quick battles. Pumpkin events related to the Wed stadium update daily and reward tasks such as simply participating, winning games, throwing pumpkins on Pokémon's heads, and playing with friends.
Once you've collected some pumpkins, you can go to the Pumpkin Swap, which is also found in the Events menu. Here you can trade your hard-earned pumpkins for certain rewards, each costing a specific number of pumpkins. Prizes include: a Greenent license; a "pointed hat", that is, a witch's hat; a new frame, sticker, pose and background of the snapshot; 1 day battle point enhancement card; and a Pumpkin Box (which just gives you more pumpkins). The official Pokémon Unite Twitter has warned players that it will not be possible to get all the rewards, so choose carefully!