As chance would have it I made something similar. My top 5 of each type.
Rather than make the 1 millionth cpokemom spic website thread I decided to do something different. This was done by picking the top 5 for each type one by one then adding the urls to each other. Attemping to do it normally deletes your list when you attempt to switch types. Each pokemon is represented in the url by a pair of two letters.
https://www.dragonflycave.com/favorite-list?favs=CECDEmCIMLsVHSJgnHA6BaGKFdDlCMAYHesRGUsGESLDHwD8sUsIFoHdsJBaIVMPBpMZIanbIfCoL1MYKEFJoUsXo6pLDiMcKErhCWBgDIpNMVEjnKMZKIB6sRINCMItrdMJnbp_G5Hep_CTLBpLMPG5ESIvHMsToUMcDisIKIMJMTo8ouCvI made the first 5 (CECDEmCIM) then made the next in another tab and added fire type's 10 letter code and so forth.