There is a secret in the original Pokémon Stadium that few know about—because few have ever actually accomplished it. This little challenge involves two special legendary Pokémon, which are not available in the beginning of the game and are not easy to acquire. If you’re looking for some help, this is how to unlock these two legendaries in Pokémon Stadium.

The secrets of Pokémon Stadium

Pokémon Stadium was created at a time when the roster of Pokémon was small. Therefore, ones like Mewtwo and Mew, seen as the ultimate legendaries, were surrounded by a unique novelty. This is why they were usually the endgame units in the early days.

In Pokémon Red and Blue, you can only meet Mewtwo in the special cave after you’ve completed the main story. Pokémon Snap has you catch Mew in the last section. Stadium is no different, having made them secret bosses, so to speak.

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How to unlock Mewtwo

To fight Mewtwo, you need to clear all the Cup tournaments and the Gym Leader Castle. Basically, that means you have to complete every challenge in the game, from soup to nuts. Once you do, Mewtwo’s battle becomes available in the form of the Mewtwo VS mode. It is an extremely difficult enemy who quickly wipes the floor with all of your units, so choose who you bring wisely.

How to unlock Mew

Unfortunately, Mewtwo was only available for the original Nintendo 64 game by registering it from a gamepak, meaning you had to have caught it in your Pokémon Red and Blue games. Therefore, there is currently no way to have it on your team as of this time. That could change if Gamefreak finds a way to connect Game Boy data, but for now, it is only a boss. The good news is that Mew is very much available as a rental. You unlock it after beating Mewtwo.

Reaching Mewtwo is no simple task, but if you do, you can certainly call yourself a true pro. You can meet it and other Pokémon in the Pokémon Stadium port with the Nintendo Switch Online Expansion Pack.