Walkthrough
South of Sevault Canyon are the Tanoby Ruins, mysterious chambers home to the Unown. A few Pokemon Trainers and other Wild Pokemon can be found outside the chambers, but the main goal is to capture every single different form of Unown.
Wild Pokemon
Outside Chambers - Surfing:
Tentacool [95%(FireRed)/90%(LeafGreen)]: Levels 5-40
Tentacruel (5%): Levels 35-40
Mantine(LeafGreen) (5%): Levels 35-40
Outside Chambers - Old Rod:
Magikarp (100%): Level 5
Outside Chambers - Good Rod:
Horsea(FireRed)/Krabby(LeafGreen) (80%): Levels 5-15
Magikarp (20%): Levels 5-15
Outside Chambers - Super Rod:
Horsea(FireRed)/Krabby(LeafGreen) (40%): Levels 15-25
Qwilfish(FireRed)/Remoraid(LeafGreen) (40%): Levels 15-25
Gyarados (15%): Levels 15-25
Seadra(FireRed)/Kingler(LeafGreen) (4%): Levels 25-35
Psyduck(FireRed)/Slowpoke(LeafGreen) (1%): Levels 25-35
Monean Chamber:
A Unown (99%): Level 25
? Unown (1%): Level 25
Liptoo Chamber:
C Unown (50%): Level 25
D Unown (30%): Level 25
H Unown (14%): Level 25
U Unown (5%): Level 25
O Unown (1%): Level 25
Weepeth Chamber:
N Unown (60%): Level 25
S Unown (30%): Level 25
I Unown (8%): Level 25
E Unown (2%): Level 25
Dilford Chamber:
P Unown (40%): Level 25
J Unown (20%): Level 25
L Unown (20%): Level 25
P Unown (14%): Level 25
Q Unown (6%): Level 25
Scufib Chamber:
Y Unown (40%): Level 25
I Unown (25%): Level 25
T Unown (20%): Level 25
F Unown (13%): Level 25
K Unown (2%): Level 25
Rixy Chamber:
V Unown (50%): Level 25
W Unown (30%): Level 25
X Unown (10%): Level 25
M Unown (8%): Level 25
G Unown (2%): Level 25
Viapois Chamber:
Z Unown (99%): Level 25
! Unown (1%): Level 25
Pokemon Trainers
Ruin Maniac Benjamin: Level 48 Geodude, Level 48 Graveler, Level 48 Graveler
Painter Edna: Level 50 Smeargle
Gentleman Clifford: Level 49 Marowak, Level 49 Golduck
Ruin Maniac Brandon: Level 50