So keep your distance while trying to take him down. He can charge at you and send you flying away, and most of the time he will follow it with his cannon to finish you off, or he can deploy the imp punt right at your face and kill you instantly.
Unless you're a chomper, running towards the all-star to kill him face-to-face is a totally bad idea.
Although in successful blast, they will be more likely to kill the plant than the charge. Due to it being slower than the charge attack, plants will likely move away from it if they see the imp punt, making it a less accurate ability than the charge. They should be a second choice to take out plants that's trying to kill you.
The Imp punt can take out plants that don't see it efficiently.
You can block off paths, or buy yourself some time when you’re healing with the scientist’s healing point.
Use your shield to cover yourself from long-range fire, or block off chompers that’s going to goop you or chomp you to death.
In some cases, you can kill multiple plants in a single charge. You can even unroot rooted peashooter and sunflower. While they're trying to get up, you have time to shoot the plant. Go on, charge them, smash them in their face, and send them flying.
If the enemy is too close, there’s no point in leaving charge attack there.
The all-star’s football cannon is weak in terms of damage per shot, which leave the all-star quite vulnerable when engaged in a close-quarter combat, when enemies move very fast.
This means that you won’t get into a situation when you forget to reload and find yourself in combat wasting time reloading. You can fire without needing to reload, but the All-star’s weapon overheats quickly (possibly the only weapon that overheats).
Not only the All-star is tough, but his weapon was great at medium to long range.
This makes the All-star very vulnerable to damage. Plus, the All-star’s armor makes him a huge target, easy to spot and land a shot at. His charge attack doesn’t bring him very far, and the long recharge rate makes this ability horrible in terms of transportation even with the charge upgrade. He moves slowly (possibly due to his heavy armor and weaponry).
Even though the All-star is the toughest playable character in-game, it came with a sacrifice.
If he lay down healing points at gardens, then most of the plants will have a hard time beating you. His undying health means that he will need an extra beating to kill him(with the exception of some of Chomper’s ability).
All-star is one of the best class to capture gardens.
When capturing gardens, watch out for chompers, your 200 health barely helps when he’s behind you.
Due to the all-star’s massive health, you will last extremely long when capturing gardens before you actually get vanquished.
The All-Star's primary weapon is the Football Cannon, a full-automatic weapon that never needs to be reloaded, but overheats very quickly and must stop being fired to cool down.