Onix in Polished Crystal

Rock / Ground — where to catch it, what it learns, and how it differs from the official games.

Compared with the official games

Stats Attack 45 → 80 (total 385 → 420)

Compared against present-day official data. The Fairy type and hidden abilities arrived after Pokémon Crystal, so a difference here can belong to the series rather than to this hack.

Other changes in this hack

Evolves into Steelix when traded holding a Metal Coat
Egg moves: Defense Curl, Rock Slide, Earthquake, Rock Blast
Wild held items: Lagging Tail, Hard Stone
Catch rate 45
Base experience 128
EV yield: 1 Def
Egg groups: Mineral
Growth rate: Medium Fast
Faithful build: base experience 108
Move tutors: Body Slam, Double-Edge, Earth Power, Endure, Headbutt, Iron Head, Rollout, Sleep Talk, Swagger

In the Faithful version

Everything above is the Polished version. In Faithful, its base stats are 35 / 45 / 160 / 30 / 45 / 70.

Onix in other guides

The same Pokémon, as 17 other hacks change it:

Unbound Emerald Rogue Infinite Fusion Radical Red Lazarus Gaia Blaze Black 2 Redux & Volt White 2 Redux Inclement Emerald Elite Redux Emerald Imperium Emerald Kaizo Blaze Black 2 & Volt White 2 Sacred Gold & Storm Silver Renegade Platinum Rising Ruby & Sinking Sapphire Blaze Black & Volt White Fire Red Omega

Where to find Onix

Area	Method	Level
Cliff Cave	Grass (day)	Base−5 to Base−1	5% rare
Cliff Cave	Grass (night)	Base−6 to Base−1	5% rare
Dim Cave 3F	Grass (morning/day)	52-56
Quiet Cave B2F	Grass (morning/day)	Base−15 to Base+2	5% rare
Quiet Cave B2F	Grass (night)	Base−1 to Base+2	5% rare
Rock Tunnel 1F	Grass (morning/day)	49-54
Rock Tunnel 1F	Grass (night)	49-54
Rock Tunnel B1F	Grass (morning/day)	50-55
Rock Tunnel B1F	Grass (night)	50-55
Silver Cave Room 1	Grass (morning/day)	70-75
Silver Cave Room 1	Grass (night)	70-75
Silver Cave Room 3	Grass (morning/day)	74-80
Union Cave 1F	Grass (morning/day)	6-9	5% rare
Union Cave 1F	Grass (night)	6-9	5% rare
Union Cave B1F North	Grass (morning/day)	6-8
Union Cave B1F North	Grass (night)	6-8
Union Cave B1F South	Grass (morning/day)	19-22	5% rare
Union Cave B1F South	Grass (night)	19-22	5% rare
Union Cave B2F	Grass (morning/day)	20-23	5% rare
Union Cave B2F	Grass (night)	20-23	5% rare
Victory Road 1F	Grass (morning/day)	41-46
Victory Road 1F	Grass (night)	41-46
Victory Road 2F	Grass (morning/day)	44-49
Victory Road 2F	Grass (night)	44-49
Victory Road 3F	Grass (morning/day)	46-51
Victory Road 3F	Grass (night)	46-51

Level-up moves

Lv	Move	Type	Cat	Pow	Acc	PP
1	Defense Curl Raises the user's Defense.	Normal	Stat	—	—	40
1	Tackle A full-body charge attack.	Normal	Phys	40	100	35
1	Wrap Traps the foe for 2-5 turns.	Normal	Phys	15	90	20
4	Curse Works differently for Ghost-types.	Ghost	Stat	—	—	10
7	Rock Throw Drops rocks on the enemy.	Rock	Phys	50	90	15
10	Rage Raises Attack if the user is hit.	Normal	Phys	20	100	20
13	Rock Blast Hurls boulders to hit 2-5 times.	Rock	Phys	25	90	25
16	Body Slam	Normal	Phys	85	100	15
19	Sandstorm	Rock	Stat	—	—	10
22	AncientPower An attack that may raise all stats.	Rock	Spec	60	100	5
25	DragonBreath A strong breath attack.	Dragon	Spec	60	100	20
28	Headbutt	Normal	Phys	70	100	15
31	Screech Sharply lowers the foe's Defense.	Normal	Stat	—	85	40
34	Rock Slide	Rock	Phys	75	90	10
37	Crunch	Dark	Phys	80	100	15
40	Iron Tail An attack that may lower Defense.	Steel	Phys	100	75	15
43	Dig 1st turn: Burrow 2nd turn: Attack	Ground	Phys	90	100	10
46	Stone Edge Has a high criti- cal hit ratio.	Rock	Phys	100	80	5
49	Double-Edge A tackle that also hurts the user.	Normal	Phys	120	100	15
52	Earthquake Tough but useless vs. flying foes.	Ground	Phys	100	100	10

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

TMs & HMs (25)

#	Move · where to get it	Type	Pow
TM03	Curse Celadon Mansion	Ghost	—
TM05	Roar Route 32	Normal	—
TM06	Toxic Celadon Game Corner	Poison	—
TM10	Hidden Power Lake of Rage	Unknown	70
TM11	Sunny Day Celadon Dept. Store	Fire	—
TM17	Protect Goldenrod Dept. Store	Normal	—
TM21	Bulldoze Route 39	Ground	60
TM23	Iron Tail Jasmine	Steel	100
TM26	Earthquake Victory Road	Ground	100
TM27	Return Goldenrod Dept. Store	Normal	1
TM28	Dig National Park	Ground	90
TM31	Brick Break Route 36	Fighting	75
TM32	Double Team Celadon Game Corner	Normal	—
TM34	Flash Cannon Route 9	Steel	80
TM37	Sandstorm Celadon Dept. Store	Rock	—
TM41	Substitute Lake of Rage	Normal	—
TM42	Facade Dim Cave	Normal	70
TM44	Rest Dim Cave	Psychic	—
TM45	Attract Whitney	Normal	—
TM48	Rock Slide Brock	Rock	75
TM59	Dragon Pulse Clair	Dragon	85
TM64	Explosion Underground	Normal	250
TM71	Stone Edge Blue	Rock	100
TM74	Gyro Ball Magnet Tunnel	Steel	1
HM04	Strength Cianwood City	Fighting	80