Apo is more on track, Dynasty Warriors is the definition of button masher.
and smash bros provided me one of my fondest gaming memories. I used to work with 2 gamecube fans and they would always come in talking about these marathon sessions of smash bros and how great a game it was. I brushed them off and told them the GC was dumb and try some Soul Caliber if they wanted a fighting game. they told me that soul caliber was a no skill button masher game and challenged me to some smash bros. well i had never even played a GC but one day I went over to my buddys house after work. Picked kirby as my character (he most fight all the teasing I gave those guys at work about the GC being kiddy and dumb) well guess what, having never played the game I managed to win the first game we played. they we're floored. we played for about an hour and a half and I still won my fair share of the matches. And yup, i was just button mashing ;)
i know that can go for about any game, where a button masher can pull out a victory or 2 vs a skilled player but I held my own for nearly 2 hours, vs 2 guys that played 1-2 hours a day.