General Tactics
Janemba is a character that's built around his teleports and neutral tools. Together they allow him to have fearsome left-right mixups and an iron grip on neutral. 236X deflects Ki Blasts and his own Ki Blasts track, allowing him to catch the opponent anywhere and stopping them from firing back. On top of those tools, his 22S completely shuts down beams and lets him run in for free pressure or even a combo.
Team positioning
Point
This is where Janemba is meant to be. His assist is pretty situational, but here he can have two assists to cover his teleport mixups. Beam assists also give him fullscreen confirms with Ki Blasts and 236X.