U know how on vs. mode in Free Battle (up to 5 per player), with the exception of Saibaman, Cell Jr., and Meta Cooler, you can't pick the same character twice in either of their forms (ie: You can't put Goku as Fighter 1 and Super Saiyan 3 Goku as Fighter 2)? Ya know what I mean, right? Ya know, like you can't be five Friezas? (is not valid for, say, normal Frieza and Mecha Frieza, or Trunks with Sword and regular Trunks, because they're in separate blocks), right?

Well, here's how to get around that rule. Put say, SS4 Goku and SS4 Vegeta as Fighters 1 and 2, and SS4 Gogeta as Fighter 3. Pick any two characters you want for Fighter 4.

Now, when you get five blast stocks, as SS4 Goku or SS4 Vegeta, have Goku and Vegeta fuse together into SS4 Gogeta. There you have it - two SS4 Gogetas on the same team in a Free Battle!

NOTE: This only works with Vegito, Gogeta, SS4 Gogeta, and Gotenks, since those are the only four fusions in the game