Villain was playing 50/30 was calling every rr oop and had previously shown a willingness to call a very wide range 1 pair, weak draws etc. in rr pots oop on flop but was folding turn to further action. As said with his image I like a bet on this flop tehre are a couple str8 draws but no flush and I feel I'll know what turns to bet with my aces if I do get called. On the turn when I turn the nutflush I can see arguments for checking but with him calling wide I expect a lot of fold equity against 8-10 out draws and I also expect calls from worse combo draws. when he donk shoves the river for less than 1/2 pot I think I still have to call I really didn't see this opponent not cring a set on the flop so I'm left with 96, K6, and a very poor call with QT but I see donks especially ones of this model playing incredibly passive on flop and turn and shoving their missed draws on the river to see if they can fold out your missed draws. if I do check behind turn what rivers other than the flush am I really happy about if I face a bet?
Poker Stars $3/$6 Pot Limit Omaha Hi - 4 players
The Official 2+2 Hand Converter Powered By DeucesCracked.com

Hero (BTN): $882.90
SB: $600.00
BB: $586.90
CO: $878.25

Pre Flop: ($9.00) Hero is BTN with A Q A 9
CO raises to $21, Hero raises to $72, 2 folds, CO calls $51

Flop: ($153.00) K 6 9 (2 players)
CO checks, Hero bets $138, CO calls $138

Turn: ($429.00) 6 (2 players)
CO checks, Hero bets $258, CO calls $258

River: ($945.00) J (2 players)
CO bets $410.25 all in, Hero calls $410.25

If he's calling with one pair hands and weak draws on the flop but folding on the turn then I think checking through the turn is the best play.

You don't gain much by folding out the 8-10 out draw hands if he's going to bluff them all on the river, and it puts you in a really sick spot if he shoves.

As played, I would fold the river. You bet the turn because you expected a lot of calls from combo draws. He called, and donked the river when the most obvious combo draw hit. You're getting a good price and his line is pretty fishy, but I think it's a fold.

Edit - I actually wrote this before looking at the results. When you post hands don't include the results immediately or you'll get a lot of skewed responses.

I didnt look at results to clarify OP. But I would say he has a hand like QJT9. If thats what he has (or a very similiar hand) you beat NOTHING on the river. Super easy fold imo. All combo draws get there and you're only bluff-catching (only a phrase used in unlimited hold'ems).

edit: sorry i didnt notice bottom pair paired the board. I would at least call some of the time in your spot and expect to be against QJ or similiar holdings
-Cragg