Stuck at the City Ninja Boss, how do I beat them?

[monnen]

I die all the times since he just continues summoning more ninjas, which characters are the best setup and what should I focus?

[Sentient Goober]

token mysterion and tweak take out the white masked ninjas first then go nutz on the others and make sure to use token's sentrygun use it to take out many in it's line of fire and ocationaly put token within the guns range and use his ability to switch places with a foe to get the enemy in the turret's line of fire use tweak to shock the ninjas and mysterion to make the ninjas deffence decreased i hope i helped

[Croquedead]

Use Tupperware, Mysterion and Call Girl. Have Call Girl defense down the White Masked Ninjas with Phone Destroyer and Mysterion along with the New Kid dealing massive damage. Use Tupperware's turret to deal good damage when enemies are on a horizontal line and use the Hot Swap to give more mobility to your allies or trap a White Masked Ninja between your characters. Once they're done, this should be pretty easy.