
In Super Smash Bros. For the 3ds and Wii U, there are several hard enemies to defeat in the mode Smash Run. I will be listing the 10 hardest enemies to beat.
10. Mimicutie : Kid Icarus

This enemy disguises itself as a treasure chest! When you approach a Mimicutie, it unleashes a flurry of powerful kicks sending players flying. These enemies are very aggressive-once you've engaged a Mimicutie it will follow you virtually anywhere.
9. Bulborb : Pikmin
These large creatures can use their massive jaws to snap at you, or they can trample you underfoot. If you spot one in a group of enemies, try to take out the Bulborb as quickly as possible. A defeated Bulborb can damage nearby enemies as it bounces through the area.
8. Polar Bear : Donkey Kong

This seemingly laid-back enemy will frequently jump into the air only to come crashing down with enough force to shake the entire area. These tremors damage anyone unlucky enough to be standing on the ground during each attack. This enemy is vulnerable to heat, however, so try to use fire-based attacks to defeat it.
7. Metroid : Metroid

When this enemy spots you, it attempts to latch onto your head! You'll take extreme damage while a Metroid is attached; slide the Circle Pad to the left and right until you shake it loose. Metroids are extremely vulnerable to cold.
6. Bonkers : Kirby

This ape-like creature uses its massive hammer to launch foes. If you're hit by its Hammer Flip attack, you'll suffer an instant KO. On top of these attacks, Bonkers can hurl exploding coconuts!
5. Megonta : Kid Icarus

This giant enemy attacks by curling itself into a ball and rolling across the battlefield. Don't bother trying to break its shell; instead, use a Down Smash attack to knock it on its back, then aim your attacks at its stomach while it tries to recover.
4. Boom Stomper : Kid Icarus

Once a Boom Stomper spots you, it follows you through the area, trying to stomp you right into the ground. Defeating one of these troublesome enemies can yield big rewards. Attack the leaf on its head to do significant damage.
3. Devil Car : Mother series

Devil Cars attack by speeding back and forth, damaging fighters with each hit. Their exhaust fumes can cause paralysis. Stay clear of an attacking Devil Car until you see an opportunity to dash in and take it out.
2. Clubberskull : Kid Icarus

When you encounter one of these enormous enemies , it will usually be trapped in one spot. Attacking a Clubberskull while set the beast free, however. Clubberskulls are very dangerous- they can't be grabbed or launched, and they can absorb an incredible amount of damage. It's often best to avoid this enemy.
Honorable Mentions
Reaper : Kid Icarus
Lurchthorn : Kid Icarus
Darknut : Legend of Zelda
Chain Chomp : Super Mario Bros.
1. Orne

This powerful enemy is immune to any of your attacks, and it will instantly KO any fighter it touches. If you spot an Orne, don't even try to fight it - just leave the area quickly.
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