This is, in my opinion, the best team for feraligatr
Note: This team will not include HMs and no trade evos
Feraligatr
Waterfall
Ice Fang
Crunch
Superpower
Feraligatr is a great starter for this game. Waterfall is the main STAB move and is an HM while Ice fang/ice beam, Crunch, and superpower are coverage moves. Feraligatr performs well against Morty with bite, Jasmine's Steelix, Pryce's piloswine, Clair with Ice fang, Will with Crunch, Koga's crobat with Ice Fang, Bruno's Onix, Karen's team, Lance's team except for Gyarados, Brock's team, Misty's Starmie with crunch, Janine's crobat with Ice Fang, Sabrina with Crunch, Blaine, Blue's Exeggutor, Rhydon, Arcanine, and pidgeot and Red's Charizard.
Crobat
Fly
Bite
Steel Wing
X-scissor/U-turn
Crobat is the best fly user in the game. It has the best stats and is pretty early game. Fly is STAB and an HM while bite, steel wing, and x-scissor/U-turn are coverage moves. It does good against Bugsy, Morty with bite, Chuck, Will with bite, Koga, Bruno except for Onix, Karen's Umbreon vileplume, and gengar, Misty's starmie with bite/x-scissor, Erika, Janine Sabrina with bite, Blue's exeggutor and machamp, and Red's venusaur.
Ampharos
Discharge/thunderbolt
Thunder wave
Light screen
Signal Beam
Ampharos is the best electric type in the game. Discharge/Thunderbolt is STAB Thunder Wave is for status signal beam is coverage and light screen is a filler. It does good against Falkner, Bugsy's Scyther, Chuck's Poliwrath, Pryce's seel and dewgong, Clair's Gyarados, Will with signal beam, Koga's Crobat, Karen's Umbreon and Murkrow, Lance's Gyarados, Brock's Omastar and kabutops, Misty's team except for quagsire, Erika's team except for victreebel, Janine's crobat, Sabrina with signal beam, Blue's Exeggutor, Gyarados, and pidgeot, and Red's Charizard, blastoise, and lapras.
Heracross
Brick Break
Mega Horn
Night Slash
Earthquake
Heracross is both the best fighting and bug type in the game. Brick Break and Megahorn are great STAB moves while night slash and earthquake are coverage moves. Heracross does good against Whitney, Jasmine, Pryce's dewgong and piloswine, Bruce's Onix, Karen's umbreon and gengar, Brock, Misty's lapras, Lt. Surge with Earthquake, Erika's tangela and bellossom, Sabrina with a choice scarf, Blaine's magcargo, Blue's exeggutor and rhydon, Red's lapras and snorlax
Espeon
Psychic
Shadow Ball
Swift
Psybeam
Espeon is the best psychic type in the game other than alakazam. Psychic is your main STAB shadow ball is coverage while swift and psybeam are fillers. It does good against morty, Chuck, Will, Koga, Bruno, Karen's gengar, Misty's starmie, Janine, Sabrina with shadow ball, Blue's Exeggutor and machamp, and Red's venusaur.
Mamoswine
Earthquake
Ice Fang
Ice Shard
Rock Slide
Mamoswine is the best ground type in the game. Earthquake and ice fang are your main STABs while Ice Shard is priority and rock slide is a filler. It does good against Clair, Will's xatu and exeggutor, Koga's team except for forretress, Bruno's onix, Karen's vileplume, murkrow, and gengar, Lance's team except for Charizard and Gyarados, Brock, Lt. Surge, Erika, Janine, Blaine, Blue's exeggutor, rhydon, and pidgeot, and Red's Pikachu, and venusaur.
Hope you guys like it!