While watching taj play against a sheik I noticed that mewtwos techroll looked fast and hard to punish off a platform techchase, so i looked into his techroll frame data. The distance of his techroll isnt great but it doesnt matter when you land on the platform because of the limited space. While most character's techrolls begin horizontal movement around frame 8, mewtwo's techroll begins horizontal movement on frame 17. The tech option is indistinguishable until frame 17 and has invincibility until frame 20(all tech rolls are inv. frames 1-20 and end frame 40). This means the attacker has significantly less time to react to your tech options. While this is usually overlooked because of the techroll's lack of distance, it is actually really good for teching onto platforms.