Thread:Chikalin/@comment-153.20.24.192-20140901014509/@comment-24366645-20140901170209

No, that's not how it works. +'s are stat enhances that can come with any unit that drops from a dungeon (possibly excluding the Town Area) or scratched from the RS. You can then fuse these +'s on any desired unit to increase their stats. The max number of pluses you can have on a unit is 198, 99 on ATK and 99 on HP. You can check where the + is allocated in the unit's detail page.

So if you happen to get, for example, a Watertron to drop with a + you can fuse it into any unit of your choice so that they may acquire this +.

We have an article explaining it further. Let me know if you have any other questions or need something to be cleared up, I'll be glad to help!