I decompiled the Game, so here (with descriptions) :
hatbuddy - gives your buddy a hat
lionel.exe - plays a strange noise
ponies - nothing (according to the game code)
holiday - part of the main game
swordbuddy - upgrades your sword in the rpg
bagelbuddy - adds bagels to the dispensible list of foods (can be used with burgerbuddy)
burgerbuddy - adds burgers to the dispensible list of foods (can be used with bagelbuddy)