- For the international version, see Frostbite Caves - Day 30.
Frostbite Caves - Ultimate Challenge is the 25th and the last level of Frostbite Caves in the Chinese version of Plants vs. Zombies 2. Being a boss battle, the player is forced to defeat the Zombot Tuskmaster 10,000 BC to win the level. When this level is finished for the first time, the player gets three stars and a chest.
Just like in the International version, the Zombot Tuskmaster 10,000 BC is easy to take out, especially with level 4 plants. The only difference between this and the International version's Day 30 is that there are three frozen Power Lilies to compensate for the lack of Plant Food and that the zombies here are at levels 3-4.