| Black 2 | When cold weather increases static electricity, its wool doubles in size and the tip of its tail glows slightly. |
| White 2 |
| Black |
| White |
| Diamond |
| Pearl |
| Platinum |
| HeartGold | If static electricity builds in its body, its fleece doubles in volume. Touching it will shock you. |
| SoulSilver | Its fleece grows continually. In the summer, the fleece is fully shed, but it grows back in a week. |
| 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 |
| 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. |
| Gold | If static electricity builds in its body, itsfleece doubles in volume. Touching it will shock you. |
| Silver | Its fleece grows continually. In the summer, thefleece is fully shed, but it grows back in a week. |
| Crystal | It stores lots of air in its soft fur, allowing itto stay cool in summer and warm in winter. |