the easiest way to do this is to play stock with 99 lives against CPU level 1 foes, then just crank the items to very high and just have pokeballs.
Doing this, I was able to see 2 mews, 1 Celebi, and 4 Manaphy's in one go.
I get Jirachi about once a month or so....
To explain brawl...
We were expecting a French Culinary pastry, and we got a McDonald's apple pie. Sure it was "good" but then you're dissatisfied and you feel like it's rushed.
The Wii Mario Party makes all Parties beforehand look like works of art.
-also-
Overrated - SMRPG (It's a great game, but I'd sooner play.....)
Underrated - SM3 (because it keeps getting bumped between world for it's awesomeness and 2 for it's underrated-ness)