How to beat Highly Modified Grizzbolt

Highly Modified Grizzbolt is a World Tree boss at level 78 with 6,506 HP, Electric. It is weak to Ground (×2), so Ground Pals hit it for extra damage. The hardest-hitting Pals to bring: Prixter Lux, Snock Terra and Anubis.

Weaknesses

Weak to

Ground ×2

Resists

Water ×0.5
Electric ×0.5

Its Electric attacks

Hit Water Pals for double damage: leave them in the Palbox. Electric and Ground Pals take only half.

×2 and ×0.5 are the community-tested values; which element beats which is the game’s own chart. The full rules are on the type chart.

The best Pals to bring

Ranked as the type chart ranks them: how hard their own element hits Highly Modified Grizzbolt, then how little they take from its attacks, then Attack. Only Pals you can catch in the wild, no legendaries.

Prixter LuxAttack 115 · wild from Lv 65Best Ground move: Sand Tornado · 200 power · Lv 22
Deals ×2Takes ×0.25Where to catch Breed it
Snock TerraAttack 70 · wild from Lv 74Best Ground move: Rocky Impact · 600 power · Lv 70
Deals ×2Takes ×0.25Where to catch Breed it
AnubisAttack 130 · alpha at Lv 55Best Ground move: Rocky Impact · 600 power · Lv 70
Deals ×2Takes ×0.5Where to catch Breed it
MoldronAttack 125 · wild from Lv 32Best Ground move: Rocky Impact · 600 power · Lv 40
Deals ×2Takes ×0.5Where to catch Breed it
Moldron CrystAttack 125 · alpha at Lv 78Best Ground move: Rocky Impact · 600 power · Lv 40
Deals ×2Takes ×0.5Where to catch Breed it
AegidronAttack 125 · alpha at Lv 79Best Ground move: Missile Burst · 700 power · Lv 70
Deals ×2Takes ×0.5Where to catch Breed it
GildraAttack 120 · wild from Lv 39Best Ground move: Rocky Impact · 600 power · Lv 70
Deals ×2Takes ×0.5Where to catch Breed it
SekhmetAttack 115 · wild from Lv 37Best Ground move: Rocky Impact · 600 power · Lv 70
Deals ×2Takes ×0.5Where to catch Breed it
Dualith NoctAttack 110 · alpha at Lv 70Best Ground move: Rocket Arm · 600 power · Lv 40
Deals ×2Takes ×0.5Where to catch Breed it
PrixterAttack 110 · wild from Lv 48Best Ground move: Rock Lance · 400 power · Lv 40
Deals ×2Takes ×0.5Where to catch Breed it

Caught by level 78, in time for the fight

Prixter Lux wild from Lv 65 · deals ×2
Snock Terra wild from Lv 74 · deals ×2
Anubis alpha at Lv 55 · deals ×2
Moldron wild from Lv 32 · deals ×2
Moldron Cryst alpha at Lv 78 · deals ×2
Gildra wild from Lv 39 · deals ×2

See every counter in the type chart, with filters for level, legendaries and Pals you can only breed.

Where Highly Modified Grizzbolt is

At Forbidden Laboratory on the World Tree, map -1998, 1626, Forbidden Laboratory (right there) by fast travel. Wild Pals around it are Lv 75–80. Open on the map

Every tower boss on the map, in order →

Rewards

Modified Pal's Contaminated Core (first win, then 100%)
1–3 Electric Radiant Gem (100%, then 11%)
1–10 or 1–5 Decayed Ancient Relic
1–5 Dormant Ancient Relic (50%)
1–3 or 1–5 Gorgeous Ancient Relic (30%)
1–2 Glowing Ancient Relic (25%)
Glistening Ancient Relic (20%)
1–3 Water Radiant Gem (11%)
1–3 Ground Radiant Gem (11%)
1–3 Grass Radiant Gem (11%)
1–3 Fire Radiant Gem (11%)
1–3 Ice Radiant Gem (11%)
1–3 Dragon Radiant Gem (11%)
1–3 Dark Radiant Gem (11%)
1–3 Neutral Radiant Gem (11%)
60–80 World Tree Holy Water

“First win” items drop only the first time you beat it.

Quick answers

What is Highly Modified Grizzbolt weak to?

Highly Modified Grizzbolt is Electric. It takes extra damage from Ground (×2), and resists Water (×0.5) and Electric (×0.5). A Pal’s moves of its own element also get the +20% same-element bonus.

What are the best Pals against Highly Modified Grizzbolt?

Prixter Lux (Electric/Ground, wild from Lv 65), Snock Terra (Electric/Ground, wild from Lv 74), Anubis (Ground, alpha at Lv 55), Moldron (Fire/Ground, wild from Lv 32) and Moldron Cryst (Ice/Ground, alpha at Lv 78). Caught by level 78: Prixter Lux, Snock Terra and Anubis. Prixter Lux hits it for ×2 and takes only ×0.25 from its attacks.

What level is Highly Modified Grizzbolt?

Normal: level 78, 6,506 HP.

Where is Highly Modified Grizzbolt?

At Forbidden Laboratory on the World Tree, map -1998, 1626, right at the Forbidden Laboratory fast travel point.

What does Highly Modified Grizzbolt drop?

Modified Pal's Contaminated Core (first win, then 100%), 1–3 Electric Radiant Gem (100%, then 11%), 1–10 or 1–5 Decayed Ancient Relic, 1–5 Dormant Ancient Relic (50%), 1–3 or 1–5 Gorgeous Ancient Relic (30%), 1–2 Glowing Ancient Relic (25%), Glistening Ancient Relic (20%), 1–3 Water Radiant Gem (11%), 1–3 Ground Radiant Gem (11%), 1–3 Grass Radiant Gem (11%), 1–3 Fire Radiant Gem (11%), 1–3 Ice Radiant Gem (11%), 1–3 Dragon Radiant Gem (11%), 1–3 Dark Radiant Gem (11%), 1–3 Neutral Radiant Gem (11%), 60–80 World Tree Holy Water.