Essentially this move is called 72 Virgins for a reason as you might figure out here:
To perform this, team snake up with a close range fast character like sonic or CF
Step 1. Make sure team attack is on (most tourneys keep it on anyways)
Step 2. Attach C4 Explosive (Down+B) to your partner.
Step 3. Partner runs twards opposing team players in an "Attacking motion" lol
Step 4. Sit back and enjoy! the C4 explosive that is stuck to your teammate will transfer to an opponents character as soon as your partner runs past them. making them a walking suicide bomber A La 72 Virgins.
Step 5. Set off the C4!
Given the size of the C4 the switch is almost unnoticeable except for the stciking sound it makes when you transfer it
- more to come let me know what you think