In the JP version, Mutoid Man & MC do not shoot constant lasers, and on some forms do not shoot lasers at all.

We recommend initially learning on the US version. This will get you used to the behavior and patterns of him shooting lasers giving you the oppurtunity to properly learn to "laser dance" with Mutoid Man.

We then recommend actually doing runs on the JP version, since you wont need to deal with the lasers the entire fight, but are now equipped to predict the patterns in the event that he randomly shoots them.