Endless Challenge

(无尽挑战) is an event in the Chinese version of Plants vs. Zombies 2. It is a worldwide competition and the rewards are a currency called Time Tokens. It is only held on weekends. The world the competition occurs is random. However, it will never be set in the Player's House.

How to play
The levels are endless in the competition, even though the player can only reach level 100. The levels are played in Last Stand format, but there is a seed packet limit for every plant depending on their rarity. A plant with a Common and Uncommon rarity will start with 10 seed packets and have a max limit of 25, Rare start with 8 and max at 20, Super-Rares begin with 5 and stop at 15, and Legendary plants start with 3 and max at 10. At the start of a level, you are only allowed to plant until it the player has run out of seed packets for a said plant. After you reached the limit, you cannot plant another one until you have obtained more seed packets. Every time you win a level, you randomly get 2 seed packets for 5 different plants, increasing the amount of times you can plant a certain plant. Sun producing plants are disabled as the level is in Last Stand. Most sun producing plants are disabled since it is played in Last Stand format. However, Toadstool can still be used. Imitater is also disabled in this mode, mostly due to its ability to mimic plants, which doubles that plant's seed packet limit. Every time the player wins a level, you will get a certain amount of sun, which increases by 50 for every level passed. Players also get Time Tokens, increasing by 5 for every tenth level beaten. Every fifth level is a boss level. Player also get score by completing levels. The zombies' level increases gradually. The maximum level a zombie can reach is 10.

There is no game over if the player loses, levels can be replayed over and over again. Though no points will be rewarded. However, players can reset their progress once a day to regain Time Tokens from the very start. The player is give a free reset everyday, afterwards which costs diamonds.

Players are ranked by scores. The more score you have, the lower the rank you are. The lower the rank you are, the more rewards you'll get every day while the competition is running.

Strategies
Overall, it is suggested to use expensive and powerful plants like Horsebean, Carrot Missile Truck, Banana Launcher, Winter Melon, Flame Flower Queen, Coconut Cannon and Citron. Most Legendaries are extemely useful and highly recommended.
 * Using Magnifying Grass is a bad idea because they waste sun, especially on boss battles.
 * Do not use instant kill plants like Squash, Lava Guava, Jalapeno, Potato Mine in early rounds like round 1-9. They are important for later rounds like boss battles. or a lot of strong zombies like Gargantuars.
 * Planting two rows of Citrons and Coconut Cannons is a good way. Only use the Blover when necessary.
 * In Neon Mixtape Tour, always put a DJ Morning Glory on the 5th column to avoid damage by Hair Metal Gargantuar's smash and Zombot Multi-Stage Masher's speakers.
 * Using Level 2 Chard Guards or higher is also a good idea.
 * Using two rows of Gatling Pea with a Torchwood is good. However, consider slowing down zombies with Sap-fling.

Trivia

 * For unknown reasons, Perfume-shroom is disabled in Jurassic Marsh, despite Perfume-shroom only usable in Jurassic Marsh levels.
 * For some reason, Kongfu World boss battles doesn't inculdes any minecarts, making it even harder.
 * In addition, the lawn mowers in boss battles in this world reuse Ancient Egypt lawn mowers instead of the Kongfu World lawn mowers.