(God knows how many times I've seen this term)evolution since her Broken Barney forced Krokorok to evolve, right? :P Iris is also responsible for stealing peoples' children
The point is subjective since he was perfectly fun, yet smart acting around May, remember?
He used Oshawott against Cilan because of Cilan, remember? Iris didn't force Ash to not use his Tranquil against Burgh. He always goes against Type advantages, that's typical Ash shenanigans, Masurao. Iris didn't force him to bring just his Palpitoad to battle Elesa, now did she?