How do you beat level 6 on 100 exits vidieo?
By tilting your device, move the can in front of the door, then tilt your device toward you so the can moves TOWARD you. Then launch the can into the door by tilting your device away from you. See related link for screenshots.
Obviously Level 100s, so maybe your starter that knows either Hydro Cannon, Frenzy Plant or Flare Blitz, or maybe some good Pokèmon from a friend or the GTS, (Global Trade Station) I beat him with an Empoleon Level 100, a Darkrai Level 100, a Mew Level 100, a Shaymin Level 100 and a shiny Psyduck Level 100. (Yes, a shiny Psyduck...)