Level 4 Boss

Start with a turbo boost and go straight ahead.

Collect the two coins directly in front of you.

Power slide in a clockwise fashion to collect the rest of the coins on the current ring.

Once all coins on the ring are collected, King Boo will likely charge. Jump into the lava in the center of the arena, costing one balloon. This resets King Boo and positions your kart.

After respawning, try to get a boost upon landing and accelerate.

Turn right and collect all coins on the next ring by power sliding clockwise.

Continue moving around the ring even after collecting all coins, and look for a line of 3 coins on a path moving away from the ring. Collect these.

Hop into the lava in the center of the ring in front of you to stop King Boo from stealing coins and reset him, placing you in the correct position again.

Once you hit the ground, boost and accelerate, then turn right.

Collect the coins on this ring by power sliding in a clockwise fashion.

Keep going around the circle to collect the three coins in the line.

This time, instead of jumping into the lava, collect the coins on the ring by power sliding in a counter-clockwise fashion. Collecting the last coin can be close, but doing it fast enough should prevent King Boo from hitting you and allow you to get the 3-star ranking.