How to Use Assists and Switch Characters in MARVEL Tōkon
Use X plus a direction to call a selected teammate; use the same direction with L2 to switch, or press L2 during the post-assist Switch prompt.
Quick Answer
Press X for an Assemble Assist: neutral/right selects teammate 2, down selects teammate 3, and left selects teammate 4. Use the matching direction plus L2 to switch, or press L2 during the brief Switch prompt after an assist.