Lost Tower lists 4 Pokémon across 24 encounter methods (grass (morning), grass (night), grass (morning), grass (night), and more), between level 17 and 22.
Lost Tower in other guides
The same area in other ROM hacks on this site. Each one has its own encounter table.
Grass (morning, Emerald in the GBA slot / FireRed in the GBA slot / LeafGreen in the GBA slot / Ruby in the GBA slot / Sapphire in the GBA slot) Lv 18-21
Grass (morning, Poké Radar, Emerald in the GBA slot / FireRed in the GBA slot / LeafGreen in the GBA slot / Ruby in the GBA slot / Sapphire in the GBA slot) Lv 18-21
Grass (night, Emerald in the GBA slot / FireRed in the GBA slot / LeafGreen in the GBA slot / Ruby in the GBA slot / Sapphire in the GBA slot) Lv 18-21
Grass (night, Poké Radar, Emerald in the GBA slot / FireRed in the GBA slot / LeafGreen in the GBA slot / Ruby in the GBA slot / Sapphire in the GBA slot) Lv 18-21
Grass (morning, Emerald in the GBA slot / FireRed in the GBA slot / LeafGreen in the GBA slot / Ruby in the GBA slot / Sapphire in the GBA slot) Lv 19-22
Grass (morning, Poké Radar, Emerald in the GBA slot / FireRed in the GBA slot / LeafGreen in the GBA slot / Ruby in the GBA slot / Sapphire in the GBA slot) Lv 19-22
Grass (night, Emerald in the GBA slot / FireRed in the GBA slot / LeafGreen in the GBA slot / Ruby in the GBA slot / Sapphire in the GBA slot) Lv 19-22
Grass (night, Poké Radar, Emerald in the GBA slot / FireRed in the GBA slot / LeafGreen in the GBA slot / Ruby in the GBA slot / Sapphire in the GBA slot) Lv 19-22