Triple Changers are characters with three modes: bot mode and two alt modes (labeled 1 and
2). They start in alt mode 1. When a Triple Changer flips, it can flip to either of the two other
modes.
If a card specifically says to flip a Triple Changer to alt mode, what happens?
[Source: WotC] 
If it’s in bot mode, you can flip it to alt mode 1 or alt mode 2. If it’s in one of its alt modes,
you can either not flip it or flip it to the other alt mode.
Can
Escape Route be used on a triple changer in Alt 2 to flip into Alt 1 and vice-versa? Are triple changers affected by Roll-Out if they are not in bot mode?
[Source: WotC]
Escape Route and
Roll Out! convert characters from Bot mode to Alt mode. They cannot convert Triple Changers from one Alt mode to another Alt mode.
Do Triple Changers start the game in a specific Alt Mode or do you get to choose which of the two you start in?
[Source: WotC]
They start in Alt Mode 1.
If I play
Cornered! on an opponent's Triple Changer, do they get to decide which Alt Mode it converts to?
[Source: WotC]
Yes.
If I attack with a character that is equipped with
Battering Ram and deal damage to a Triple Changer, does my opponent get to choose the mode they change to or do they have to change from Alt 1 to character and vice versa.
[Source: WotC]
Your opponent can choose which mode of its other modes to flip to.
