Dream team is Mantine, Skarmory, Smeargle, Espeon, Dunsparce, Heracross. Basically my top favorite Johto pokemon.
Edit: more detail
Mantine - Is a strong, commendable water type and the counterpart to an OU mainstay and formidable defensive wall Skarmory. It has a slick and adorable manta ray design. It's elegant and can take special hits well. It is the best water/flying > Gyarados, Pelipper, Swanna. Its relationship with Remoraid is cool example of pokemon mutualism. I think Mantyke is unnecessary because it ruins its status as a cool single stage pokemon while Skarmory is still going solo. Speaking of Skarmory.
Skarmory - is a goat pokemon, being a defensive single stage pokemon playing with the OU big shots and holding its own. It's has a sleak, light but durable silver bird design and it can go 190 MPH. It is most certainly on top of the food chain in the pokemon world. If Skarmory gets a pre-evo, despite fans wanting symmetry between Skarm and Mantine, I'll be very annoyed as it wouldn't be that cool solo pokemon that stands among the pseudos and legendaries.
Cute beagle dog with some utility from its nigh limitless movepool. I love how it sticks its tongue out. If this thing gets ruined by an evolution I'll be annoyed. I rather it have a stat buff like Mantine to make it better in battle.
Best eeveelution and powerful at that. Best eevee design and it also happens to be my favorite psychic. Umbreon is overrated, Espeon is way cooler. I love its design, its so sleak and memorable with its gem and forked tail. Gen 2 battle wise may seem wimpy to tier lovers but you can't beat gen 2 designs.
Good old dunsparce, always being dumped on by people. Always being compared to the likes of Magikarp and Luvdisc. People always talking about some "evolution" and I remember that Drampa theory during the Sun and Moon talk. Dunsparce is too cool to be a pre evo of Drampa, lol, and it's to cool for an evolution and should get a mega or stat buff. It's a adorable snake bug thing apparently based of some fabled Tsuchinoko in Japan. If I ever decided to play competitive again, I'll use this thing in any tier without any doubt or care that it's not a high on tier lists.
Heracross with its Herculean strength will always be the best bug/fighting. Good stand out design, GF messed up on its mega and instead gave Pinsir all the mega glory. Still Heracross, mega or not is a true force to be reckon with and like Skarmory, hangs with three stage monsters and still comes out standing strong solo (I really like single stagers). No pre-evo for this thing thank you GF. Just focus on making a good game.