Well, now this was certainly a treat!
We get appearances from three of Ash's old Pokemon.

Charizard is still it's same old awesome Flamthrowing self! (with a Steel Wing bonus!)

Bulbasaur likes to walk on it's hind legs a lot.

Ashs Squirtle is bigger than Mays. (no surprise. Seeings how Ash has had his longer.)

Max: I've always wanted to try that!
Me: o_o. (sarcastically) hahahahahahahahaha!!!

What was that piece of music that played when *game ref start* CHARIZARD snapped out of Confusion! *game ref end* ? I think I recognize it