1. There's footage on YouTube of Tristan wearing Bakura's short light-blue jacket, and Bakura wearing Tristan's long black jacket. These jackets don't match the characters. Both incidents were too brief for many to notice.
2. Tristan always seems the most protective of/concerned for Bakura. And there's a screenshot on KokoroNoNaka of them holding hands...and Bakura wearing HIS OWN light-blue jacket.
3. Whenever the gang pairs up and Bakura's not unconscious or possessed, those two ALWAYS gravitate to eachother.
4. I read somewhere that, at some point, Tristan was stalking Bakura? I dunno if this is true or not, though...
1. Multiple times has Malik stared at Yami Bakura's backside, while they were trying to get rid of Malik's personality disorder.
2. During that time, they were consistantly together. More exact, disappearing into the Shadow Realm for episodes at a time. And they argued like an old married couple--and sometimes Malik would tell Yami Bakura about his rod.