• Natural Selection - If the player also has [Irradiated Lead] , [Monster Blood] or [Big Boy] , the gun evolves after every 3 unique enemy types.
• The Powerhouse of the Cell - If the player also has [Antibody] , the Evolver evolves one stage.
• Enemies do not need to be killed by Evolver for it to evolve.
• If the player has [Backup Gun] , during the frog form, both frog tongues will home in on the same enemy, effectively doubling damage.
• In its final form, the shots will home in on enemies. However, the effect is very slight.

Purchase from Professor Goopton for 35 .