| Pokedex Entries: |
| Gold | If static electricity builds in its body, its fleece doubles in volume. Touching it will shock you. |
| Silver | Its fleece grows continually. In the summer, the fleece is fully shed, but it grows back in a week. |
| Crystal | It stores lots of air in its soft fur, allowing it to stay cool in summer and warm in winter. |
| Ruby | MAREEP's fluffy coat of wool rubs together and builds a static charge. The more static electricity is charged, the more brightly the lightbulb at the tip of its tail grows. |
| Sapphire |
| Emerald | Its fluffy wool rubs together and builds a static charge. The more energy is charged, the more brightly the lightbulb at the tip of its tail glows. |
| FireRed | Its fleece grows continually. In the summer, the fleece is fully shed, but it grows back in a week. |
| LeafGreen | If static electricity builds in its body, its fleece doubles in volume. Touching it will shock you. |
| Diamond | Its fluffy coat swells to double when static electricity builds up. Touching it can be shocking. |
| Pearl |
| Platinum | Its fluffy coat swells to double when static electricity builds up. Touching it can be shocking. |
| Stadium 2 | If static electricity builds in its body, its fleece doubles in volume. Touching it will shock you. |
| TCG | Mareep: Its soft wool coat captures air, allowing it to remain cool during the summer and warm in winter. |
