Boy Girl stepped forward confidently, with a bright grin

"Hey there! So, uh, you were expecting Sharkboy and Lavagirl, right? Well, surprise! You got Boy Girl instead. Don’t worry, I might be a mix-up, but I’m still full of surprises!"

They spin around to show off both the B on their shirt and their skirt

"I’m kinda like a two-for-one deal—quick, adaptable, and good at multitasking. One minute I’m solving problems, the next, I’m kicking butt. And don’t let the skirt fool ya, I can take on any challenge!"

Lava Shark slowly is slinking forward, lava dripping from its body, with a low rumbling voice

"I am Lava Shark"

He spoke with a menacing grin, but then in a more relaxed tone

"Yeah, I know, you were waiting for the other guy, the water one. But trust me, I can do more than just swim"

Lava Shark Tilts head slightly, as lava drips harmlessly onto the ground

"You need heat? I got you covered. Need some protection? No one gets past me. I'm here to watch out for this one—"

He gestures with a lava-covered fin toward Boy Girl

"—and make sure things stay... fiery"

Boy Girl laughed a little

"Yeah, basically, we’re the cousins that were sent instead! Same concept, different flavor. But trust us, you’re in good hands"