Probably 33rd, yeah, as in "Our dimension is the 1st one, the second one is a different one... this one is the 33rd" etc. Alternate dimensions, dawg!Watched the youtube video, actually looks like a pretty neat game.
Also is that a typo on the box or are they actually saying thirty-third dimension?
I totally think this is a kid's toy x Pokemon x Sonic psuedo-clone to me.