Actually, the PS3 has Dinasty Warriors 5 as the biggest game at the end of May. That alone is bigger than any of the Wii games before WSR...
4/23
PS3: Killzone 2 (FFXIII Bundle 2nd week).
Wii: MHG + Classic Controller + MH3 Demo, Tomb Raider Underwolrd, Major Minor Majestic March.
4/30
PS3: Cruz del Sur Koei MMORPG, X-Blades, NHL2K9.
Wii: Power Pros 2009, Fish Eyes, a mini game compilation and a table game.
5/7 Nothing (Golden Week)
5/14
PS3: Nothing.
Wii: PES09.
5/21
PS3: Nothing.
Wii: Takt of Magic.
5/28
PS3: Tom Clancy's HAWX, Dinasty Warriors 5: Empires, Stranglehold (Best Price), Agarest Senki (Best Price).
Wii: Kizuna.
6/4
PS3: Nothing.
Wii: Arc Rise Fantasia.
6/11
PS3: Nothing.
Wii: New Play Control: Chibi Robo, New Play Control: Metroid Prime 2.
6/18
PS3: Nothing.
Wii: Wii Sports Resort + Wii Motion+.
6/25 (PS3 Price Cut??)
PS3: BlazBlue, BattleField: BC (Best Hits), Bionic Commando, Atelier Rorona, Agarest Senki Zero, Pure, Top Spin 3, Wanted: Weapons of Fate.
Wii: Top Spin 3, MySims Racing.
Proud poster of the 10000th reply at the Official Smash Bros Update Thread.
tag - "I wouldn't trust gamespot, even if it was a live comparison."
Bets with Conegamer:
Pandora's Tower will have an opening week of less than 37k in Japan. (Won!)
Pandora's Tower will sell less than 100k lifetime in Japan.
Stakes: 1 week of avatar control for each one.