Oh wow Howdy, that's quite an amazing collection! The Flying Pikachu and Birthday Pikachu are so adorable! And I totally remember having that pikachu in between them in my old collection before I sadly gave them away. I also love the ketchup and mustard deck name, so funny! XD I can't even remember what type of decks I had in the past. I remember at one point I bought a Brush Burn deck from BJs that was fire and grass but it got stolen at school shortly after I bought it. T_T

I think now probably the rarest card I have is that Ancient Mew one they gave out at the movie theaters when the first Pokemon movie came out:



Other than that I have a deck of French cards I won in a tournament in France when I went to a convention there. I'd only be able to use it with friends who trust me though since they have no idea what the attacks do. ^^;