SD Gundam G Generation ETERNAL ULT Modification Guide

When upgrading mobile suits through ULT modification in SD Gundam G Generation ETERNAL, fully invest your alteration materials into a single unit through Stage 5 before starting another. Spreading scarce modification materials across multiple units leaves them with partial stat bumps while missing the transformative Skill 2 and EX Skill upgrades unlocked at Stages 4 and 5.

Five-Stage ULT Modification Track

Each eligible mobile suit advances through five sequential alteration stages. Raw parameters—Hit Points, Attack, and Defense—increase at every tier, while specific kit enhancements unlock at designated milestones.

Alteration Stage	Primary Stat Increase	Kit Upgrade Unlocked	Tactical Role Impact
Stage 1–2	Moderate HP and Defense	Skill 1 Base Value Boost	Improves opening-turn survivability
Stage 3	Substantial Attack and HP	EX Skill Parameter Scaling	Increases burst damage output
Stage 4	Advanced Combat Power	Skill 2 Passive Expansion	Expands solo or team utility
Stage 5	Maximum Stat Cap	EX Skill Additional Effects	Unlocks complete ability kit

Base attribute gains from alteration scale with external multipliers, including pilot stats, equipped modules, and battleship bonuses.

EX Skill and Passive Ability Overhauls

Advancing through the alteration stages changes how a mobile suit operates in combat by upgrading its active burst potential and passive triggers.

EX Skill Enhancements

Reaching Stages 3 and 5 alters the unit's primary EX Skill in two distinct ways:

Damage Multipliers: Offensive suits gain higher damage coefficients on single-target and area-of-effect skills, alongside increased hit counts to help bypass enemy damage cuts.
Secondary Utility Effects: Support and defensive units gain active secondary effects upon skill activation, including multi-turn squad attack buffs, critical strike boosts, enemy defense shredding, or reductions to beam and physical resistances.

Reworked Passive Skills

The alteration track updates older, rigid passives—such as requirements for full health or specific enemy matchups—into more reliable benefits:

EX Gauge Acceleration: Passives grant immediate gauge recovery at battle start or upon landing critical hits to reduce skill cycle times.
Layered Damage Reduction: Defensive units gain innate percentage-based damage cuts against incoming beam or physical attacks, stacking multiplicatively with defensive modules.
Turn-Based Stat Scaling: Carries receive ramping attack buffs that accumulate across turns or activate whenever allies trigger EX Skills.

Upgrade Priority Rules

Because alteration items and unit currencies are strictly limited, select your first candidate using these criteria:

Current Team Placement: Upgrade a mobile suit that already holds a permanent roster spot and features high transcendence levels or existing pilot synergy.
Team-Wide Utility and Meter Gain: Prioritize units that gain squad buffs, enemy resistance debuffs, or gauge generation, as functional utility outlasts pure stat increases.
Dedicated Damage Dealers: Upgrade pure single-target attackers only when your squad lacks coverage for a specific elemental or range matchup.