In Pokemon GO's Holiday Part 1 branching research, trainers face a choice: aid Spark or Sierra. While Niantic's official announcement omits this free research (available December 17-22, 9:59 AM local time), it's a key part of the event. After completing the initial tasks, players must select their path.
Choosing Spark or Sierra: A Matter of Type and Rewards
The core difference lies in the Pokémon type focus and reward encounters. The choice isn't drastically impactful, but it affects which Pokémon you'll prioritize catching.
Spark's Ice-Type Challenge

Selecting Spark directs you towards Ice-type Pokémon. Part 2 rewards an Alolan Vulpix encounter.
Spark's Research Tasks: Part 2
| Research Task | Reward |
|---|---|
| Catch 10 Ice-Type Pokémon | 10 Pinap Berries |
| Take 5 snapshots of wild Pokémon | 20 Poké Balls |
| Complete 5 Field Research Tasks | 500 Stardust |
| Complete All Three Tasks | Alolan Vulpix & 2000 XP |
Spark's Research Tasks: Part 3
| Research Task | Reward |
|---|---|
| Catch 25 Ice-Type Pokémon | 10 Ultra Balls |
| Power Up Ice-Type Pokémon 10 Times | 1 Golden Razz Berry |
| Collect MP from 3 Power Spots | 100 Max Particles |
| Complete All Three Tasks | Sandygast, 3000 XP, 2000 Stardust |
Note: Part 3's final reward (Sandygast) is consistent regardless of your choice.
Sierra's Fiery Pursuit

Choosing Sierra focuses your efforts on Fire-type Pokémon, culminating in a Shadow Vulpix encounter in Part 2.
Sierra's Research Tasks: Part 2
| Research Task | Reward |
|---|---|
| Catch 10 Fire-Type Pokémon | 10 Pinap Berries |
| Take 5 snapshots of wild Pokémon | 20 Poké Balls |
| Complete 5 Field Research Tasks | 500 Stardust |
| Complete All Three Tasks | Shadow Vulpix & 2000 XP |
Sierra's Research Tasks: Part 3
| Research Task | Reward |
|---|---|
| Catch 25 Fire-Type Pokémon | 10 Ultra Balls |
| Power Up Fire-Type Pokémon 10 Times | 1 Golden Razz Berry |
| Collect MP from 3 Power Spots | 100 Max Particles |
| Complete All Three Tasks | Sandygast, 3000 XP, 2000 Stardust |
Your decision hinges on your preferred Vulpix variant and the Pokémon type you wish to concentrate on during the Holiday Part 1 event. Pokemon GO is available now.