I was playing Plants VS. Zombies 2 Chinese Version, and I went on to play on Penny's Pursuit as a new event started, and while I got on the level 3, I found this zombie:
It does not appear in Almanac or in the beginning where all zombies of the level are seen while choosing seeds for the level. The zombie basically messes around going anywhere all the way up to the lawn mower by moving both horizontally and vertically, it won't cause any harm to the plants, heals the zombies, randomly drops silver and gold coins, and when you defeat it, it spams silver and gold coins on the location he died.
To mention again, it's not regular PvZ 2, it's the Chinese version of it.