Ant Lion is the 22nd (Monkey Ball, Super Monkey Ball) and 51st (Super Monkey Ball Deluxe) stage of the Advanced difficulty in Monkey Ball, Super Monkey Ball, and Super Monkey Ball Deluxe. In Deluxe, it appears as World 5-12 in Story Mode.
This stage does not resemble or look like an antlion.It instead appears as a square platform with a hole and a wall near the start and goal. There are two banana bunches and one banana in between them. With its funnel-shaped depth and hole in the middle, rely on the angle in which your monkey is rolling. To prevent easy goal entries, there is a wall placed in between the starting position and the goal.
To get to the goal, keep your balance on the tilted wall near the hole. And once on the other side of the wall, roll straight up, and go into the goal. Try not to get too close to the edge, or else you may fall off the floor.