became, ended up becoming
そのうちに味方は俺だけになっちまった
Before long, I was the only one left on my side.
— 紅の豚 (1992)
俺はおかしくなっちまったのか?
Have I gone crazy?
— The Garden of Sinners: Paradox Spiral (2008)
まったく妙なことになっちまったぜ
This has turned into a real strange mess.
あんたもいい男になっちまったねぇ
You’ve turned into quite a handsome man yourself.
俺はどうなっちまったんだ
What the hell has happened to me?
— Carandiru (2003)