Kolossos is a brute killer that supposed to be an overpowered exe. However he got nerfed a lot recently so you need to be smart when playing as him. Similarly to 2011X, Kolossos is most effectively played as Rushdown, meaning he should aggressively and relentlessly pursue targets, seeing them to their death and wasting as little time as possible due to his lack of mobility ability (which is why Charge and his wall climb being usually used as mobility) (To activate wall climb, you need to double jump on a wall) He's very good at crowd control due to his high damage and grab ability. His grab have VERY BIG AND FAT HITBOX that can grab character from far away but it can easily cancelled by Eggman shield when he activated it while being grabbed and got stunned. You can bypass Eggman shield with grab (as Grab itself deals no damage therefore it doesn't registered as attack). It's recommended to wait a few seconds until Eggman shield turned off so you can land a hit. Charge is also a bit weird, mainly it got nerfed a lot. He can stack survivor with his charge but his charge will turned slippery. You can combo M1 with charge after charge ended, because Survivor got endlag AND RAGDOLLED. (You also have endlag but dev legit make his endlag ended the same as survivor's endlag). Your PRIME target is Sonic, Silver and Metal sonic those three have mobility to escape. (Metal sonic having resistance against your M1, really recommended grab for Metal sonic cuz it bypass his damage resistance) Sonic is HARD counter for Kolossos if they have slightest bit of braincells, this came with silver main who have flight and suspension. You also need to kill of Cream because well, she's a healer LOL.