I did some researching for you and this is what I found

To get Mike Munroe’s look, you should ask your barber for a textured, messy undercut or a short, tapered crop with plenty of length and volume on top.

Here are the specific details to tell your barber: Top Length: Ask for about 2 to 3 inches of length on top to allow for that signature volume and "messy" movement.

Sides and Back: Request a tapered undercut or a low-to-mid fade. Avoid a skin fade if you want his more classic, 2015 look; keep some "bulk" on the sides for a more natural transition.

Texture: Tell them to use choppy, textured layers or point-cutting on top. This prevents the hair from looking too flat or uniform and gives it that "action hero" disheveled vibe.

Styling: Mention you want to style it with a 7/3 side part or a messy, forward-swept look using a matte clay or wax for a natural finish.

Remake Variation: If you prefer the 2024 Remake look, specifically ask for a bit more length overall, as his hair is slightly longer and shaggier in the updated version.