According to Wikipedia
Sakurai’s goal with Ultimate was to include every character from previous games despite the various development and licensing problems this would cause.
A few days ago, Nintendo Japan Officially printed a guide for smash Bros. ultimate. this book contains 832 pages.
If you look carefully at these images you will see Both Snake and Pokémon Trainer
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It means amiibo for Pokémon Trainer and Solid Snake are on the way
We’d like to appreciate the efforts of miketendo64 and Nintendowire.