Starting today Pokémon Go players will have to do some more work to catch ‘em all. Developer Niantic has announced that a slate of new pocket monsters are now available in the game, including the likes of Pichu, Togepi, and other pokémon pulled from the second generation Pokémon Gold and Silver.

No specific number of creatures was revealed, but Niantic says that you’ll only be able to capture them by acquiring and hatching eggs from pokéstops. In addition to the new generation two monsters, starting from now until December 29th, Pokémon Go will also be home to a “special edition” version of Pikachu. What makes him special is that he wears a festive holiday hat.

The news comes as Niantic has announced a series of other features and updates intended to lure players back to Pokémon Go, including turning Sprint stores into gyms and pokéstops, a new pokémon-themed Starbucks drink, and limited-time in-game events.

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