Great mons they look pretty balanced, but Infection should have an in-battle effect such as "The Pokemon that uses a contact move on the user will recieve an Infection condition. This condition will make Burn and Poison double residual damage than ehat they would normally give", thats just a suggestion though. And also the Healers first ability should really be something like Friend Guard, Healer, Bodyguard (Ill propose an ability)" or something like that. Also I would like to suggest the healers getting Helping Hand and the infecters have Sludge Wave or something related to Poisoning on a bigger scale than Toxic.