Hello, I'm working on a project where you can select what tnt you want and then push a minecart into the machine and it will turn in to the minecart version of that tnt. But since there are many different minecarts with tnts, i cant really summon enything else but the Explosive Cart. I try to use /summon icbmclassic:cart.bomb and then /summon icbmclassic:cart.bomb:1 but it just says it cant summon that entity. How do i summon minecarts like the anvil tnt, anti-matter tnt and so on

Explosive data is set via NBT on the carts. Place one normally in the world and then use a tool to check the NBT. From that you can then setup entity spawning.