Groudon's drought has dried out a route, now what?

Once a drought dries out a route, the Weather Institute's forecast points you to which one, and a cave mouth opens there that wasn't before. That's Terra Cave, reachable only after you're Champion. Groudon waits at the end, a Lv. 70 wall of bulk and the toughest thing you'll have fought to that point.

What should I bring to take Groudon down?

Save right in front of the cave, then lead with a Water or Grass type that laughs off its Ground and Fire attacks. Pack a deep stack of Ultra Balls and a move that puts it to sleep, because landing status and shaving its health is the whole fight.

Do I actually need Flash in Emerald's caves?

Almost never. You can feel your way through the dark stretches, and the cave HM that actually earns a party slot is Rock Smash, not Flash. Flash only matters for a couple of black rooms late in Victory Road, so don't waste an early move slot on it.

Is Rock Smash worth bringing into caves in Emerald?

Yes, more than Flash is. Smashing the cracked rocks in Granite Cave turns up a Nosepass you won't meet any other way, and the ones in Victory Road hide Geodude and Graveler. Keep one party member who knows it so you're not backtracking when a breakable rock shows up.

Emerald Terra Cave

A cave that opens only after you've beaten the Champion and a freak drought scorches certain routes. Groudon waits at the very back, the same titan you watched rampage during the story.

Terra Cave is in Hoenn. In the story it comes after Desert Underpass and before Marine Cave.

TERRA CAVE MAP

Emerald

Terra Cave Walkthrough

0 trainers 0 items 0 species

Terra Cave appears only after you finish the main story, and only during a drought on one route.

1From the cave mouth, go north, then east, then north through Terra Cave to the upper tunnel. Climb through to the inner cave.
2From the upper tunnel, go east, follow the winding passage south through Terra Cave, then east along the bottom to battle Groudon.
Legendary encounter
GroudonLv 70
Post-E4; appears when strong sun weather shows on Routes 114/115/116/118

Pokemon Encounters

✦Special encounters1

#383Groudon

Legendary Lv 70

Legendary

#383

Groudon

Ground

Level

EV yield

3 Attack

Acquisition

Legendary

Appears in Terra Cave after becoming Champion — location rotates between routes

at Room 2

Sealed locationRoom 2Terra CaveView on map

One-of-a-kind. You only get a single shot per cartridge — knock it out or run, and it is gone for the run. Save before engaging.

Groudon page →

Terra Cave Guide

Once a drought dries out a route, the Weather Institute's forecast points you to which one, and a cave mouth opens there that wasn't before. That's Terra Cave, reachable only after you're Champion. Groudon waits at the end, a Lv. 70 wall of bulk and the toughest thing you'll have fought to that point.
Save right in front of the cave, then lead with a Water or Grass type that laughs off its Ground and Fire attacks. Pack a deep stack of Ultra Balls and a move that puts it to sleep, because landing status and shaving its health is the whole fight.
Almost never. You can feel your way through the dark stretches, and the cave HM that actually earns a party slot is Rock Smash, not Flash. Flash only matters for a couple of black rooms late in Victory Road, so don't waste an early move slot on it.
Yes, more than Flash is. Smashing the cracked rocks in Granite Cave turns up a Nosepass you won't meet any other way, and the ones in Victory Road hide Geodude and Graveler. Keep one party member who knows it so you're not backtracking when a breakable rock shows up.