Question: what is the difference between wave incense and sea incense?
Answer: For battle Sea Incense boost water type moves by 20%, while Wave Incense just boost all water type moves. For breeding, Sea Incense causes Marill and Azumarill to produce an Azurill Egg while at the Pokémon Day Care, while Wave Incense causes Mantine to produce a Mantyke Egg while at the Pokémon Day Care.