Harry drinks potions in the LEGO Harry Potter games for a few reasons:
* To solve puzzles: Some potions have special effects that help Harry overcome obstacles or reach areas he couldn't otherwise access. For example, the Invisibility Potion allows him to sneak past enemies or explore hidden areas.
* To fight enemies: Certain potions can boost Harry's attack power or provide him with temporary buffs. For instance, the Strength Potion makes him hit harder, while the Felix Felicis Potion gives him a luck boost.
* For fun and variety: Even if not strictly necessary, using potions adds another layer of strategy and fun to the gameplay. It breaks up the monotony of just using your basic spells and can be quite satisfying to unleash a powerful potion on a group of enemies!
While the potions themselves aren't always realistic in terms of their effects, they add a playful and enjoyable element to the LEGO Harry Potter games.