Ok, this is the sixth episode of Super Mario bros z.
Now before you watch, if you want to get backround info on this then look at the earlier episodes.
This episode is mainly a.. how should I say this?
Devastatingly hyper-action thriller blockbuster show!
This episode is about a clash between the Mario brothers, Sonic, Shadow the hedgehogs and Yoshi vs. the Koopa brothers vs. the Axem Rangers.
If you want to see what happened before look at part 1 of episode 6.
This part is when Mecha Sonic comes and well, you just have to see it.