The panes are of different sizes: a 1-square pane is a help-pane, 2-3 square panes are support panes, and 4-6 square panes are playable characters. Half the fun is making your own decks is finding 'chains' of characters that give each other boosts, and figuring out how to get them arranged properly (since the panes are specific tetris-like shapes) so that all related characters are next to each other.

Certain characters are 'related', that is, by placing them next to each other they gain stat boosts (usually a longer health bar). It is a 5x4 grid (which holds 20 squares), and you make and name your own decks by choosing panes and arranging them in your deck. The bottom screen that houses these panes for playable characters, support characters, and help characters is called the 'deck'. Finally, you have help characters that don't appear on-screen, but in-game you press their pane to give your playable character stat boosts such as more speed, more strength, brief invisibility, and others.

Imagine the wild, up to 4-player gameplay of Super Smash Bros only you can switch between 3 or 4 different characters on the fly by pressing their pane in the manga-themed touch screen (main gameplay is in the top screen), and can also call in support characters (ala Marvel Vs Capcom) to attack your enemies, heal you, or do other stuff by pressing their pane. Jump Superstars is a fighting game featuring characters from Shonen Jump comics, released only in Japan.

Jump superstars rom english patch