Metal/Oil typing

Metal/Oil is a two-type typing. When a ball is unlocked, one of the two becomes its primary typing. It attacks with that type and defends with both. With Metal as its primary typing, it attacks with Metal. Its attack is strongest against Agriculture, Ice and Nature. It's weakest against Fire, Metal and Shadow. With Oil as its primary typing, it attacks with Oil. Its attack is strongest against Fire and Nature. It's weakest against Energy and Water. On defense, it's weakest against Fire, Chaos and Shadow and strongest against Nature, Agriculture, Cosmic, Faith, Ice and Metal.