Special Summon it, also you cannot Special Summon for the rest of this turn, except Dragon monsters
If you want a decent copy but aren't thrilled at the idea of spending over $100, you can find MP cards closer to $90, though LP jumps into the $105 range.
When you play this card, you have the choice to exert up to 2 selected characters, preventing them from readying at the start of their next turn
Mega Abomasnow would have made for a great dual-type EX with both the Water and Grass-type, but the dual-type cards in this era were an underutilized mechanic, just like poor Abomasnow itself
However, the deck is very reliant on consistent pieces, and early versions of the deck played a rather abstract support engine
You cant have Fumble in a non-sports set, so this is a big flavor hit