How to unlock Slither Wing
There is no direct purchase for Slither Wing. It appears on the Paldea banner inside the 4★ pool. The 4★ band takes 6.5% of all pulls and holds 211 partners, so one specific Slither Wing works out to about 0.0308% per draw. The 70-pull pity counter only applies to 5★ results, so Slither Wing has no floor of its own and no targeted pull. A duplicate Slither Wing refunds 120 coins at the 4★ rate.
Slither Wing stats and rank
The sheet lists Slither Wing at 108 HP, 112 speed, ×1.44 attack, ×1.44 physical and ×1.17 special, with 79 defense and 105 special defense — 570 base-stat total. On the three-stat percentile this is 78.2 out of 100, which puts Slither Wing at rank 97 of 966 and in tier A. Relative standing explains more than the total here: its strongest slot is physical multiplier (96th percentile) and its weakest is defense (63rd percentile), so it is a specialist rather than an all-rounder.
Best moves in Slither Wing's pool
At move level 5 the pool is led by Karate Chop at 46.2 damage per 0.38s (177.4 effective DPS, ×1.44 multiplier), then Body Slam at 75.6 damage per 0.71s (152.8 effective DPS, ×1.44 multiplier), then Tackle at 33.6 damage per 0.38s (129.0 effective DPS, ×1.44 multiplier). 11 of its 17 damaging moves scale with the physical multiplier and 6 with the special one, alongside 4 support moves. Its physical multiplier is the higher of the two (×1.44 against ×1.17), so physical moves convert better. The top option beats the second by 24.6 DPS, which decides slot one and leaves slot two as a judgement call.
Evolution cards for Slither Wing
Its starting move, Bug Bite, evolves into X-Scissor once the move is at level 5 and you hold the Power card, which boosts attack for that run. A level 5 move without Power in the run is still just a level 5 move. 17 of its 21 moves carry an evolution card, across 6 distinct cards (Vigor, Sprint, Power, Reflexes, Armor and Synthesis). The strongest of them is Karate Chop at 177.4 effective DPS, so that is the one worth holding a card for first.
Slither Wing compared to similar partners
The two closest stat lines in the roster are Dragonite (+3 HP, +0 speed, same attack multiplier, +30 total) and Gyarados (+5 HP, +0 speed, -0.05 attack, -30 total). Against Dragonite, the two are level on speed and the two carry an identical ×1.44 attack multiplier, and the rank gap is 29 places. The exchange rate is the point: nothing here improves on both lines at once, so neither side is a strict upgrade and the move pools have to break the tie.