The question is actually about TS3.
Wow. I WAY overlooked that. Just shows I need to see TS3 again. Thanks for pointing that out, Sheriff I would have spent way too much time being confused. June 18th is way to far back, I def. need to see it again.
He probably climbed up the back.
Because Chatter Telephone told Lotso’s gang, and Ken was part of that.
[spoil]But Ken was all tied up to the paddle ball by Barbie in the Dreamhouse. No one except him and Barbie fit in the dreamhouse, He came to the garbage chute after other came. He was still in his underwear when he shoed up,[/spoil]
He found her trough the power of love 
I just realized how risky “Operation Playtime” is…I mean, what if Andy had decided to look at his cell phone and see his own house is calling? Or he had picked up the home phone they were using and saw it was dialing out to his cell phone? And then, although unlikely, if he ever opened Buzz’s communicator again, they’d be in trouble…
Eh, whats the worst that would happen? someone would see evidence and say “hmm, that’s weird…” but that’s about it. theres no way any of it can be linked back to the toys. People don’t typically suspect inanimate objects (or at least what they assume to be) to be responsible for this kind of thing. No matter what he would probably just blame Molly. she’s probably A, done things like this in the past, and B, used to getting stuff blamed on her when its not her fault anyway.