Assassin Bear is the Black variant of Teacher Bear and is the fastest moving and one of the fastest attacking enemies. At 100% strength magnification, he deals 3,000 damage per hit, which might not seem like much, yet he keeps himself very safe with a range of almost double that of Dark Emperor Nyandam.
This enemy is usually used as a mean to guarantee the defeat of the player by spawning in masses once a time limit is reached, sometimes preannounced by a Ms. Sign.
In a level like Forever Fishing, he is used as a gimmick, in which he spawns as soon as an enemy dies, due to the enemy limit, leading into an instant defeat.
His weak point is the health, find a way to just hit this enemy and, unless he's very buffed or you are using Sniper the Recruit, that will be enough.
Strategy
Most of the stages with Assassin Bear usually have him come out if you take too long, making him easily avoidable in those stages. The Cat Cannon can kill an Assassin Bear easily, however at higher magnifications it cannot deal enough damage, meaning a certain defeat in almost every case.
Using Shockwave Cats/Surge Attack Cats. If the Assassin Bear comes out when the base receives enough damage, it means that it will also spawn onto a shockwave or surge and die instantly. In other scenarios, it's still possible to hit the bear by using a 'stepping stone peon' and long enough waves.
The last option is using a unit to clip through the Assassin Bear after being knockbacked, the best choice for this would be Manic Lion Cat, although other options can still work, they have to be ultra fast in order to instantly rebound after being knockbacked and have a fast attack rate to kill the Assassin Bear after getting knockbacked.
Assassin bear from the darkness of the world.
The number of assassination requests has plummeted in this recession.
Offering 100 million per kill.
Wrote a request in the flyers this morning.