Arin heard the snickering himself and already knew what it was. 

Kirby stopped when a bunch of men-like shadows came into view.

Mikey looked at the shadows. "What are those?" He asked.

Arin turned to Mikey when he asked a question and then turned to face the shadows. "These are shadows that a certain necromancer likes to send after me." He said, hoping these things wouldn't try anything. He avoided saying the necro's name as the very thought of it would annoy him. He kept his calm demeanor however. 

Shredder spotted the turtle and smirked. "Where are your fellow turtles? Or did they somehow change forms?" He said, referring to his four new friends.

"My fellow turtles didn't change forms, I just happened to meet to these guys." Mikey countered as he got out his Numchucks.

A few shadows looked down to see something poking through the ground and picked it up. It was a needle, There were several more needles ahead. The shadows grabbed them and started throwing them at the one Hunter had claimed as 'dino-boy'(Arin).