A collection of various card and board games for kids with pictures of Mario and his friends/enemies on them instead of numbers.
Currently I know of only 2 games that you can play in Mario's Game Gallery, but there are more:
1. You can play checkers using Mario characters like Yoshis and Koopa Troopas.
2. The other game that I know is featured in this game is "Go Fish". The cards that you play with have pictures of Mario enemies on them instead of numbers.
3. Dominos
4. A Yhatzee like game called "Yacht".
This is also one of the few games were you can actually hear Mario talk.
 
As far as I know this game is as far as I know identical to Mario's FUNdamentals.

Note the small Yoshis, Koopa Troopas and big ugly Bowser as well...
 

Go fish Mario!