Image prompt:

Playful cartoon scene with exaggerated proportions, thick outlines, and bright, saturated colors. Inside a buzzing gym set up for a Hyrox-style competition: Sonic the Hedgehog (bright blue, spiky speedster) hammers a rowing machine on the left, cheeks puffed and grinning, legs pumping with dramatic motion lines and starry sweat sparkles; Shadow the Hedgehog (black with red streaks) blasts the ski erg on the right, yanking the handles with whoosh lines and tiny snowflake confetti swirling. Behind them: bold black-and-yellow event arch, lane markings and cones, stacks of medicine balls, and a silly podium holding a giant birthday-cake trophy with barbell-shaped candles. A cheering cartoon crowd in party hats with kettlebell balloons, streamers, and confetti filling the air. Dynamic, slightly low-angle wide view; glossy cel shading, chunky outlines, electric blues, crimson reds, neon yellows, candy pink confetti; whimsical, energetic poses and big expressive faces.

Text on image (small, one line, bold playful lettering at the top or bottom):

“Hyrox and roll — Happy Birthday!”

Generated with these themes: Blue hedgehog sonic, Black hedgehog shadow, Rowing machine, Ski erg machine, Gym, Hyrox competition, and .

Made with ❤️ by AI.