Can I change my Chosen Champion between games in a match, such as swapping from a Viktor Leader to a Viktor Innovator that shares the same name with my Legend?

Ruling: Yes, as long as the competition allows a sideboard, you can change your Chosen Champion after the first game of a match to any card in your main deck or sideboard.

Nuances:

• The Chosen Champion must still share the same name with your Legend
• This is only allowed in competitions that permit sideboards