Some of my new assist ideas: 1. You can assist your friend from zombies like that you need to shurikens to 20 of them (Like on blimp invasion but zombies and a little bit different.) and if they get close you and you don't have 20 zombies killed you lose and get the XP, Gold and the Grade like C. 2. Everyone knows the assist when you run away from genbu? This is kinda same but a little bit different. Genbu is chasing you and you need to avoid it's attacks. It does the Shoop da whoop power, and runs fast at you sometimes. you need to avoid them by jumping :P I'm still thinking the 3rd idea.
Here come dat boii