Yes, you can create a Pokémon team fully covering all 18 types

After much breeding, training and effort, one passionate Pokémon Scarlet & Violet player (let‘s call him Dave) finally pieced together his dream team featuring every single one of the 18 Pokémon types in some form. He shared his roster online to rave reviews and comments impressed by the creative type coverage. So it is indeed possible, though extremely difficult, to attain a team with no type weaknesses if you leverage dual typing correctly.

The Fully Covered Dream Team

Putting together his team was not easy for Dave – it involved scouring Paldea for exactly the right Pokémon, breeding for ideal IVs/natures, and training multiple team candidates before settling on the final lineup.

But in the end, his perseverance paid off resulting in this well-rounded, defensive dynamo of a roster:

With 3 dual types, Dave managed to cover 
all 18 types using just 6 team slots - an 
impressive feat very few players accomplish!

After finally attaining his white whale team, Dave was overjoyed by the overwhelmingly positive support from the community. Many players asked about his strategy for picking members and what challenges he faced along the way…

Choosing the Optimal Type Coverage Duos

While Dave‘s goal was hitting all 18 types, most players aim for combinations providing the best offensive and defensive synergy. These dual types have moves hitting lots of opponents for bonus STAB damage, while resisting common attacks.

Top utility combos include:

Some analysis on why these pairings are so effective:

• Steel/Fairy – Steel already resists 11 types; adding Fairy covers its Fighting weakness. An amazing defensive core.
• Water/Ground provides neutral Fire resist alongside poison/rock/steel resilience. Water STAB hits hard.
• Mimikyu‘s Ghost/Fairy leaves it with a solitary Fairy weakness while hitting most foes for solid neutral coverage.
• Steel/Bug hits key threats like Grass, Psychic, and Dark enemies. Defense shines with 12 resistances like Steel/Fairy.

While Dustox, the only current Bug/Steel mon, is weak stat-wise, I hope future Pokémon can better utilize this incredible type pairing!

Just 2 moves can hit all types super effectively!

Did you know you only need Ghost and Fighting type attacks to hit every possible Pokémon for bonus weakness damage?

• Ghost hits everything (besides Normal/Dark) at least normally
• Fighting wrecks Normal/Dark for super effective, patchung Ghost‘s sole weakness

So for instance, a Gengar sporting Shadow Ball + Focus Blast has 100% optimal type coverage! Even single types like Blissey with Shadow Ball + Drain Punch gain flawless neutral coverage hitting foes for normal damage at worst.

Of course you typically want same-type attack bonus (STAB) as well which is why Ghosts/Fighting paired with Psychic/Dark moves tend to have the best overall coverage. But technically just two moves can hit every type combination in the optimal way!

The Rarest and Worst Type Pairs

Just as some dual types like Steel/Fairy shine above the rest, other combos limp by with terrible matchups. Generally:

• More weaknesses = Worse defensively
• Less resisted types = Better coverage offensively

Based on their subpar defensive and offensive prowess, the weakest type combos include:

Meanwhile, the outright rarest pairings seen so far include:

I‘d love to see future Bug/Ghosts, icy metallic Pokémon or punching dragon mons! Their uniqueness would bring welcome diversity even if not always the most competitively viable.

Closing Thoughts

It takes immense knowledge, creativity and perseverance, but assembling a team hitting all 18 types is an incredible achievement. For the rest of us, focusing on dual types with solid utility like Gastrodon and Lucario puts you on the path towards wall-breaking offensive power or defensive longevity. Bug/Grass represents more of a cautionary tale showcasing type combinations you typically want to avoid based on poor matchups.

Thanks for reading my deep dive on Pokémon‘s intricate elemental type system – let me know if you have any other questions as I‘m always happy to provide my take as a longtime competitive battler!