Some things (music, sound effects etc.) are a bit different in between the Wii and the PSP/PS2 versions but overall they're pretty much carbon copies with some comparatively low quality textures. One thing that's definitely a downgrade is the ice effects, in the Wii version the Ice effects looked Translucent and resembled actual ice, in the PS2/PSP version they are completely opaque. Similarly in the Wii version when something got frozen the model actually got covered with an Ice texture, in the PS2/PSP version the models just turn Dark Blue. However even with these downgrades they are still a worthy enough experience, i mean looking at the hardware you just have to expect some downgrades and these aren't really all that bad