At night, this Pokémon uses its broad tongue to burrow a hole in the seafloor sand and then sleep in it. While it is sleeping, Shellder closes its shell, but leaves its tongue hanging out.
Its hard shell repels any kind of attack. It is vulnerable only when its shell is open.
| Rank | IVs | CP | Lvl | Stat Prod | % |
|---|---|---|---|---|---|
| 1 | 15/15/15 | 1221 | 50 | 1350680 | 100.00% |
| 2 | 15/14/15 | 1217 | 50 | 1341615 | 99.33% |
| 3 | 14/15/15 | 1211 | 50 | 1340369 | 99.24% |
| 4 | 15/15/14 | 1216 | 50 | 1336897 | 98.98% |
| 5 | 15/13/15 | 1213 | 50 | 1332550 | 98.66% |
| 6 | 14/14/15 | 1207 | 50 | 1331373 | 98.57% |
| 7 | 13/15/15 | 1202 | 50 | 1330059 | 98.47% |
| 8 | 15/14/14 | 1211 | 50 | 1327925 | 98.32% |
| 9 | 14/15/14 | 1206 | 50 | 1326692 | 98.22% |
| 10 | 15/12/15 | 1208 | 50 | 1323485 | 97.99% |
| 11 | 15/15/13 | 1210 | 50 | 1323115 | 97.96% |
| 12 | 14/13/15 | 1203 | 50 | 1322378 | 97.90% |
| 13 | 13/14/15 | 1198 | 50 | 1321132 | 97.81% |
| 14 | 12/15/15 | 1193 | 50 | 1319748 | 97.71% |
| 15 | 15/13/14 | 1207 | 50 | 1318952 | 97.65% |
| 16 | 14/14/14 | 1202 | 50 | 1317788 | 97.56% |
| 17 | 13/15/14 | 1197 | 50 | 1316487 | 97.47% |
| 18 | 15/11/15 | 1204 | 50 | 1314420 | 97.32% |
| 19 | 15/14/13 | 1206 | 50 | 1314235 | 97.30% |
| 20 | 14/12/15 | 1199 | 50 | 1313382 | 97.24% |
| 21 | 14/15/13 | 1201 | 50 | 1313015 | 97.21% |
| 22 | 13/13/15 | 1194 | 50 | 1312205 | 97.15% |
| 23 | 12/14/15 | 1189 | 50 | 1310891 | 97.05% |
| 24 | 15/12/14 | 1203 | 50 | 1309980 | 96.99% |
| 25 | 11/15/15 | 1184 | 50 | 1309438 | 96.95% |
| 26 | 15/15/12 | 1205 | 50 | 1309332 | 96.94% |
| 27 | 14/13/14 | 1198 | 50 | 1308884 | 96.91% |
| 28 | 13/14/14 | 1193 | 50 | 1307651 | 96.81% |
| 29 | 12/15/14 | 1188 | 50 | 1306281 | 96.71% |
| 30 | 15/13/13 | 1202 | 50 | 1305355 | 96.64% |
| 31 | 15/10/15 | 1200 | 50 | 1305355 | 96.64% |
| 32 | 14/11/15 | 1195 | 50 | 1304386 | 96.57% |
| 33 | 14/14/13 | 1197 | 50 | 1304202 | 96.56% |
| 34 | 13/12/15 | 1190 | 50 | 1303279 | 96.49% |
| 35 | 13/15/13 | 1192 | 50 | 1302915 | 96.46% |
| 36 | 12/13/15 | 1185 | 50 | 1302033 | 96.40% |
| 37 | 15/11/14 | 1199 | 50 | 1301007 | 96.32% |
| 38 | 11/14/15 | 1180 | 50 | 1300649 | 96.30% |
| 39 | 15/14/12 | 1201 | 50 | 1300545 | 96.29% |
| 40 | 14/12/14 | 1194 | 50 | 1299980 | 96.25% |
| 41 | 14/15/12 | 1196 | 50 | 1299337 | 96.20% |
| 42 | 10/15/15 | 1174 | 50 | 1299127 | 96.18% |
| 43 | 13/13/14 | 1189 | 50 | 1298816 | 96.16% |
| 44 | 12/14/14 | 1184 | 50 | 1297514 | 96.06% |
| 45 | 15/12/13 | 1198 | 50 | 1296475 | 95.99% |
| 46 | 15/9/15 | 1196 | 50 | 1296290 | 95.97% |
| 47 | 11/15/14 | 1178 | 50 | 1296076 | 95.96% |
| 48 | 15/15/11 | 1200 | 50 | 1295550 | 95.92% |
| 49 | 15/15/10 | 1194 | 50 | 1295550 | 95.92% |
| 50 | 14/13/13 | 1193 | 50 | 1295390 | 95.91% |