General

If they're rolling around then that's a good way for you to apply pressure. Time an attack to where they'll be when their roll stops, and they'll get hit by it, as there is a brief moment of vulnerability after each roll. Use your down smash if you predict that someone is gonna roll behind you. Additionally, if they're only rolling around, then your dash should still be faster than them (most of the time), so you can catch up rather easily.

They made rolling almost broken in this game, because like above said, they reduced thto amount of time you can transition to roll from roll. You just have to grab or down smash, or go to a campy character. Honestly, I play robin a lot, so I own the little macs all the time.

@LazyLazyLazy
They reduced the amount of frames of vulnerability in this game compared to the others.
It's a lot harder to punish. Of course you can still counter it, but it's not as easy for the average player.

Switch to a campy character and barrage all their options with projectiles. They wont be rolling for long.
#Toonlink

Grab and down smash. Should just be highly annoying once you get used to it.

[quote=LazyLazyLazy]thought it easy to counter/punish spammers since it's predictable[/quote]
I have on multiple occasions actually but it very annoying and hard to punish someone who rolls to the edge of the stage and spam b I the block the projectiles and rush him and surprise surprise he rolls to the other side and do the same damn thing! >.<

thought it easy to counter/punish spammers since it's predictable

Then reset your score