The numbers agree
with Smogon.

These scenarios intentionally produce different numbers from Smogon's reference. Each cites Serebii / Bulbapedia where our reading of Champions behavior beats Smogon's current implementation.

1. 01
   attacker-ability/Galvanize/extreme-speed

   Smogon's Champions mechanics omit Galvanize from the -ate list; ours applies per Serebii.

   ours 28–33·theirs 23–28
2. 02
   attacker-ability/Overgrow/bullet-seed

   Multi-hit reporting style differs (Bullet Seed 2-5 hits).

   ours 6–20·theirs 9–12
3. 03
   defender-ability/Ice Scales/dark-pulse

   Smogon omits Ice Scales (~0.5 special) in its Champions mechanics file; ours applies per Serebii.

   ours 19–23·theirs 39–46
4. 04
   defender-ability/Shadow Shield/extreme-speed

   Smogon omits Shadow Shield (≡ Multiscale) in its Champions mechanics; ours applies.

   ours 18–21·theirs 36–43
5. 05
   defender-ability/Fluffy/close-combat

   Smogon omits Fluffy in Champions mechanics; ours halves contact damage per Serebii.

   ours 13–15·theirs 26–31
6. 06
   defender-ability/Fluffy/flamethrower

   Smogon omits Fluffy in Champions mechanics; ours doubles fire damage per Serebii.

   ours 42–52·theirs 21–26
7. 07
   defender-ability/Intimidate/close-combat

   Auto-apply defender Intimidate is a UX choice; Smogon requires manual -1 atk.

   ours 18–21·theirs 26–31
8. 08
   item/Hard Stone/stone-edge

   Compound modifier rounding on a ≥200-damage roll; 1.8% drift within chain-order precision.

   ours 180–212·theirs 182–216
9. 09
   item/Light Ball/thunderbolt

   Smogon's Champions calc doesn't apply Light Ball; ours doubles Pikachu attack per Serebii.

   ours 63–75·theirs 31–37
10. 10
    item/Yache Berry/icicle-spear

    Multi-hit reporting style differs.

    ours 44–140·theirs 110–140
11. 11
    multihit/bullet-seed

    Multi-hit reporting style differs: ours shows min(1)-max(5) range, Smogon shows deterministic 3.

    ours 26–80·theirs 39–48
12. 12
    multihit/icicle-spear

    Multi-hit reporting style differs: ours shows min(1)-max(5) range, Smogon shows deterministic 3.

    ours 104–320·theirs 156–192
13. 13
    tera/defender-resist

    Smogon's Champions calc omits tera; ours swaps defensive types per mainline rules.

    ours 38–45·theirs 76–91
14. 14
    item/Expert Belt SE/close-combat

    Smogon's Champions mechanics omit Expert Belt; ours applies mainline ×1.2 on super-effective hits.

    ours 324–384·theirs 268–324
15. 15
    combo-atk/Overgrow/venusaur/bullet-seed

    Multi-hit reporting style differs.

    ours 6–20·theirs 9–12
16. 16
    combo-def/Prism Armor/play-rough

    Smogon's Champions calc doesn't check Prism Armor; ours applies ×0.75 on SE.

    ours 60–72·theirs 80–96
17. 17
    combo-def/Ice Scales/dark-pulse

    Smogon omits Ice Scales; ours applies per Serebii.

    ours 19–23·theirs 39–46
18. 18
    combo-def/Shadow Shield/extreme-speed

    Smogon omits Shadow Shield.

    ours 18–21·theirs 36–43
19. 19
    combo-def/Fluffy/close-combat

    Smogon omits Fluffy.

    ours 13–15·theirs 26–31
20. 20
    combo-def/Intimidate/close-combat

    Auto-apply defender Intimidate (UX choice).

    ours 18–21·theirs 26–31
21. 21
    combo-def/Storm Drain/waterfall

    Smogon's Champions calc uses Storm Drain only to redirect; ours treats as type immunity (mainline dual-effect).

    ours 0–0·theirs 18–21
22. 22
    combo-item/Hard Stone/stone-edge

    Compound rounding on a ≥200-damage roll.

    ours 180–212·theirs 182–216