Pokémon Go is celebrating the day Pokémon was originally released in Japan with a special Pokémon Day starring Armored Mewtwo, Clone Pokémon and more on February 27th at 1 PM until March 2nd, according to its official page. In other words, it’s less like a day and more like a week, so don’t panic about missing the events.

The franchise debuted in 1996 in Japan and has gone strong since then, with yearly releases and over 800 total Pokémon.

While “catching them all” in one game is currently impossible, the app Pokémon Go has been releasing a steady stream of Pokémon and will be bringing back an Armored Version of Mewtwo to Five Star Raids on February 27th.  The psychic beast will be joined by several clone Pokémon to celebrate the Netflix release of Pokémon: Mewtwo Strikes Back—Evolution.

Players will be able to capture the Clone Pokémon Venusaur, Charizard and Blastoise in four star raids, but be warned that the battle itself (and the battle with Mewtwo) is very difficult without a group of friends. We recommend planning ahead and bringing close to ten people for those planning to raid multiple gyms, as there’s a timer that counts down even for the most stoic small groups. As soon as that timer reaches 0, the battle is over and the Pokémon is gone, unless everyone flees the battle before then.

Clone Pikachu also has a chance of popping up for those users who use the #Gosnapshot feature. By taking a picture of your Pokémon in the app, there’s a chance Clone Pikachu will pop up in the finished photo. Pikachu will then drop directly to your location for a chance to be caught. Generally, this feature allows one Pokémon to be caught a day, so don’t bother spamming photos. And if that Pikachu flees, game over– try again tomorrow.

Finally Pikachu and Eevee will pop up in the wild, wearing festive hats to celebrate the occasion. These festive hats have made their appearance before in previous GO events. Bulbasaur, Charmander and Squirtle can be obtained too as well as their shiny counterparts, but only through 7 KM eggs, so get to walking. Finally, players will be able to make two special trades a day as long as this event is active. Happy catching!