-Synergy: When two or more party members have a high enough affinity, they can unleash a Synergy Charge that gives a boost to skills and attacks.
-Synchro Skills (element): party members can gain skills that are a fusion of theirs and another members element.
-Fusions: All slimes can fuse together and with other creatures. (Not in Prototype, yet)
Other Features
-Equippable Talents: Sometimes enemies will give you skills that you can equip them with.
-Expandable Kingdom map: The more members you recruit, the bigger your kingdom grows. (Not available in-game, will add later)
-A unique Storybook-like Art style!
-Side-scrolling Maps: Because THEY'RE COOL!
-Sideview Battle System: Best fit for a game like this, IMHO...