1. Type Mismatch: Armadillomon is primarily a Ground-type Digimon. Dominimon is a Virus-type Digimon. This mismatch in type wouldn't make sense from a narrative or evolutionary standpoint.
2. Personality and Power: Armadillomon is generally portrayed as a kind and defensive Digimon, while Dominimon is a ruthless and domineering Digimon. The personalities clash significantly. Furthermore, Dominimon's power is focused on brute force and manipulation, which doesn't align with Armadillomon's focus on defense and resilience.
3. Design: Armadillomon's design features strong armor and a defensive posture, while Dominimon has a more aggressive and intimidating design. The visual styles don't match up well.
Better Alternate Megas for Armadillomon:
* MetalGarurumon: This would be a great alternate form, as it's a powerful, defensive Digimon with a clear evolutionary connection to Armadillomon (both are based on armor).
* WarGreymon: While a classic Digimon, WarGreymon's power and presence could be a powerful counterpoint to Armadillomon's defensive nature.
* Dynasmon: A more unique option, Dynasmon's focus on defense and versatility could make for a fitting and powerful Mega for Armadillomon.
Ultimately, the best alternate Mega for Armadillomon depends on the specific narrative and desired thematic elements. However, Dominimon's characteristics and design don't make it a suitable choice for Armadillomon's evolution.