[Plains Crash Site]

BLAM!

The bullet punches through the monster's chest, resulting in a low reverberating roar from the beast that makes the ground shake! There's a good chance its organs are all messed up since the thing is... well... all messed up.

It charges blindly in the direction the shot came from, thrashing at the grass angrily!

[Beach]

The yoshi makes a gagging noise as his neck is constricted! Though the poor sliver may find its entire upper body getting dragged into the yoshi's mouth.

Yellow will then aim to wrap his claws around the base of the sliver's tails and REND them apart. If the tail is sheered off the sliver will probably be swallowed easily. Though if not even being inside Yellow's mouth will expose the sliver to absurdly caustic digestive enzymes that can reduce a full grown koopa to a protein slurry in under a minute.

Dear gods yoshis are scary...

As for the armor... It's built in typical full-plate style, vital organs all fully encased in a cuirass of Buzzy Beetle carapace. Areas that require more flexibility are protected with Chain-Chomp Mail backed by Koopa leather and Lekitu cloud padding. That would be the best spot to aim a stab, though it might be hard to stab all the way to something vital.

Truth be told the yoshi's unarmored head and neck are the best target.

Or the belt for that matter.

SLASH!

Right through the belt!

Pulling it off shouldn't be too hard at this point. Yellow is distracted with the whole not getting strangled to death thing.