Pikachu VS Samurott instead of Pikachu vs Lucario
Because the evolution deus ex machina came back to rob Ash of a match he could have won if he was more uh..well rounded? And didn't choose Boldore to go up against a Pokemon like Hydreigon(no offense, Boldore.) And the 6 v 5 thing too.
What's wrong with choosing Boldore vs. Hydreigon? It at least had Rock Smash which was super effective and Sandstorm could've provided it with a good tactic against Hydreigon. And Flash cannon and Rock SPAM were pretty decent moves in its arsenal. You're better off complaining about why Ash threw Oshawott into that match-up... whose only unresisted move was Tackle and didn't pull through. And then you could wonder why Ash insisted on Pignite fighting Samurott after having dealt with Hydreigon and Ferrothorn despite the obvious disadvantage - while he switched out Pikachu once Riolu came out in favor of Unfezant (which to be fair was a good call).
That match should've gone:
- Boldore vs. Hydreigon: Hydreigon
- Pignite vs. Hydreigon: Pignite
- Pignite vs. Swanna: Switch
- Pikachu vs. Swanna: Pikachu
- Pikachu vs. Ferrothorn: Switch
- Pignite vs. Ferrothorn: Pignite
- Pignite vs. Samurott: Samurott
- Oshawott vs. Samurott: Switch out.
- Snivy vs. Samurott: Snivy
- Snivy vs. Riolu: Riolu
- Oshawott vs. Riolu: Riolu evolves and wins.
- Unfezant vs. Lucario: Lucario
- Pikachu vs. Lucario: Lucario
But yeah, that didn't happen.