Lulu Support vs Caitlyn ADC Matchup

Lulu Support wins 48.3% of 14,359 Low Elo games against Caitlyn ADC, -1.7 points vs expected, 2-patch window 26.19-26.20.

Researched on LoL patch 26.20. Tips are written to hold at any rank; stats come from Low Elo ranked games up to patch 26.20.

How to play as Lulu

When Caitlyn is outside your attack range, cast Help, Pix!(E) on a forward minion and aim Glitterlance(Q) from Pix's position to reach farther down the lane. (Unverified: no source confirms this note.)

Use Help, Pix!(E) on yourself or an ally before a primed Headshot(P) or a trap follow-up lands; the shield can absorb part of that burst. (Unverified: no source confirms this note.)

If a low-health ally is lined up with Ace in the Hole(R), you can intercept its projectile; shield yourself first if possible, and only block it if you can survive the hit. (Unverified: no source confirms this note.)

Whimsy(W) polymorph immediately incapacitates Caitlyn, preventing her from firing basic attacks, casting abilities, or using 90 Caliber Net(E) to escape.

Wild Growth(R) adds bonus health rather than healing, so casting it before Ace in the Hole(R) hits can increase the target's health buffer; it does not reduce Caitlyn's damage.

How to play as Caitlyn

When Lulu steps up, threaten her with basic attacks and watch for Help, Pix!(E) or Whimsy(W); both can reach as far as your 650 attack range.

Caitlyn's 650 basic attack range exceeds Lulu's 550, letting Caitlyn threaten from 100 units farther away when she can maintain spacing.

Sources

These notes come from LoL Wiki, checked against the champions' abilities.