Helix Models
This is the most comprehensive list of models and blocks that you can find for every amp, cab, distortion, modulation, pitch, and other effects found on the Line 6 Helix, Helix Rack, Helix LT, HX Stomp, HX Stomp XL, HX Effects, and Helix Native.
Delay: Mono
Found 23 mono models.

Simple Delay
Based on: Line 6 Original

Mod/Chorus Echo
Based on: Line 6 Original
Sweep Echo
Based on: Line 6 Original
Ducked Delay
Based on: TC Electronic® 2290
Reverse Delay
Based on: Line 6 Original
Vintage Digital
Based on: Line 6 Original
Vintage Swell
Based on: Line 6 Original
Pitch Echo
Based on: Line 6 Original
Transistor Tape
Based on: Maestro® Echoplex EP-3
Cosmos Echo
Based on: Roland® RE-201 Space Echo
Adriatic Delay
Based on: BOSS® DM-2 w/ Adrian Mod
Buy now at: Buy BOSS® DM-2 w/ Adrian Mod at Amazon
Adriatic Swell
Based on: Line 6 Original
Elephant Man
Based on: Electro-Harmonix® Deluxe Memory Man
Multi Pass
Based on: Line 6 Original
Heliosphere
Based on: Line 6 Original
Firmware version: 3.15
Poly Sustain
Glitch Delay
Euclidean Delay
Based on: Line 6 Original
Firmware version: 3.10
ADT
Based on: Line 6 Original
Firmware version: 3.15
Crisscross
Based on: Line 6 Original
Firmware version: 3.15
Tesselator
Based on: Line 6 Original
Firmware version: 3.15
Ratchet
Based on: Line 6 Original
Firmware version: 3.15