The Sims 1: "Edit Pet" Cheat Without Unleashed Expansion – Not Possible

There is no "edit pet" cheat in The Sims 1, with or without the Unleashed expansion.

Reasons:

• Pets Require Unleashed: Pet mechanics were introduced exclusively in The Sims: Unleashed. Base game has no pet system to edit.
• Limited Cheat Scope: Base game cheats focus on gameplay/objects, not creature creation/editing.

Alternatives:

• Get Unleashed: Adds full pet gameplay.
• Mods (Unofficial): Community mods may add pets to base game, but are unsupported by EA and risk instability. Back up saves before installing mods.