Onix

RockGroundRock Head, Sturdy

Pewter City Mt. Moon Basement · Lv 12-14 Rock Tunnel · Lv 23-25 Open in the guide Compare

In FireRed Deluxe: First found in Pewter City (Event), and in 3 more areas. Its type (Rock / Ground) is the same as in the official games. Base stats total 425, up from 385; 2 of the six changed, most of all HP (35 → 55). Abilities: it loses Weak Armor. 3 of its 12 level-up moves are new compared with Pokémon FireRed & LeafGreen, including Mud Shot and Rock Slide.

Level-up moves 12

Lv	Move	Type	Cat	Pow	Acc	PP
1	Screech Lowers the target’s Defense by two stages.	Normal	Stat	—	85	40
1	Tackle Inflicts regular damage with no additional effect.	Normal	Phys	35	95	35
8	Bind Prevents the target from fleeing and inflicts damage for 2-5 turns.	Normal	Phys	40	75	20
12	Rock Throw Inflicts regular damage with no additional effect.	Rock	Phys	50	90	15
19	Harden Raises the user’s Defense by one stage.	Normal	Stat	—	—	30
23	Mud Shot Has a chance to lower the target’s Speed by one stage.	Ground	Phys	55	95	15
30	Rock Slide Has a chance to make the target flinch.	Rock	Phys	75	90	10
34	Sandstorm Changes the weather to a sandstorm for five turns.	Rock	Stat	—	—	10
41	Body Slam Has a chance to paralyze the target.	Normal	Phys	85	100	15
45	Iron Tail Has a chance to lower the target’s Defense by one stage.	Steel	Phys	100	75	15
52	Sand Tomb Prevents the target from fleeing and inflicts damage for 2-5 turns.	Ground	Phys	40	70	15
56	Double-Edge User receives 1/3 the damage inflicted in recoil.	Normal	Phys	120	100	15

* a legal move, just moved to level-up · ** new to this game

TMs & HMs

This game's documentation doesn't publish TM compatibility, so none is listed here.

Where to find Onix

Area	Method	Level
Pewter City	Event
Mt. Moon Basement	Grass	12-14
Rock Tunnel	Grass	23-25
Rock Tunnel 2nd Floor	Grass	23-25

Other changes in this game

Base stats against the original game: +20 HP, +20 Atk
Evolves into Steelix at Level 33
Evolves into Steelix with a Johto Stone